Nervous System
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The document summarizes key components and functions of the nervous system in 3 paragraphs. It discusses that the brain interprets sensations, stores memory, reasons, makes decisions and coordinates movement. It notes the spinal cord acts as a pathway between the brain and body and facilitates spinal reflexes. It introduces the three types of neurons and provides a diagram showing how sensory input leads to integration and motor output via the central and peripheral nervous systems.
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The document discusses neuronal pathways and sensory systems, explaining that sensory input travels through a series of connected neurons from sensory organs to the central nervous system. It describes concepts like contralateral representation, sensory transduction, information coding through labeled lines and receptive fields, and how properties like adaptation, threshold, convergence, and acuity contribute to sensory processing. Key sensory examples are provided to illustrate these neuronal and sensory concepts and phenomena.
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Sensory system
The document summarizes the human sensory system. It describes the general senses associated with skin, muscles, and organs, as well as the special senses located in the head like eyes, ears, nose and mouth. It then discusses sensory receptors that detect stimuli and transmit signals to the brain, as well as the sensations and perceptions that result. Different receptor types respond to stimuli like chemicals, pain, temperature, and mechanical forces. The pathways and processing of sensory signals in the central nervous system are also outlined.
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The sensory system has two types of receptors - extroceptors that respond to external stimuli and introceptors that respond to internal stimuli. Sensory receptors transduce environmental signals into neural signals and include specialized epithelial cells and neurons. They have receptive fields and transmit messages through sensory neurons to the central nervous system. The document describes the main sensory receptors in the skin for touch, vibration, pressure, and pain and outlines the pathways for posterior column and anterolateral sensory processing up to the sensory cortex.
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The document describes the main parts of a neuron and their functions. The axon carries nerve impulses away from the cell body, while dendrites carry impulses toward the cell body. Schwann's cells form a protective myelin sheath around axons, and the myelin sheath insulates and speeds up nerve impulses. Synapses allow neurons to transmit electrical signals to other neurons through the release of neurotransmitters.
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The document provides an overview of the nervous system, including its main components and functions. It discusses the central nervous system (CNS), peripheral nervous system (PNS), and neurons. The three main functions of the nervous system are to receive stimuli, integrate input, and respond to stimuli. The CNS includes the brain and spinal cord, while the PNS links the CNS to receptors and effectors. Neurons transmit signals through electrical and chemical processes. The document also describes the pathways of nervous transmission and different types of neurons and reflexes.
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Neurons are the basic structural and functional units of the nervous system. There are three main types of neurons: motor neurons carry signals from the central nervous system to the muscles and glands, sensory neurons carry signals from receptors in the body into the central nervous system, and interneurons connect neurons within the brain and spinal cord to pass information between motor and sensory neurons.
Nerve cell
Neurons are electrically excitable cells that transmit information through electrical and chemical signals. They have a cell body, dendrites, and an axon. Neurons come in different shapes and sizes and can be classified by their morphology and function. They can be afferent neurons that convey sensory information into the central nervous system, efferent neurons that transmit signals from the central nervous system to effector cells, or interneurons that connect neurons within the central nervous system. Neurons can also be classified by their electrophysiological characteristics, such as being tonic, phasic, or fast spiking. Neurons affect other neurons by releasing neurotransmitters that bind to receptors on postsynaptic neurons.
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The document summarizes the human sensory system. It describes the general senses associated with skin, muscles, and organs, as well as the special senses located in the head like eyes, ears, nose and mouth. It then discusses sensory receptors that detect stimuli and transmit signals to the brain, as well as the sensations and perceptions that result. Different receptor types respond to stimuli like chemicals, pain, temperature, and mechanical forces. The pathways and processing of sensory signals in the central nervous system are also outlined.
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The sensory system has two types of receptors - extroceptors that respond to external stimuli and introceptors that respond to internal stimuli. Sensory receptors transduce environmental signals into neural signals and include specialized epithelial cells and neurons. They have receptive fields and transmit messages through sensory neurons to the central nervous system. The document describes the main sensory receptors in the skin for touch, vibration, pressure, and pain and outlines the pathways for posterior column and anterolateral sensory processing up to the sensory cortex.
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The document describes the main parts of a neuron and their functions. The axon carries nerve impulses away from the cell body, while dendrites carry impulses toward the cell body. Schwann's cells form a protective myelin sheath around axons, and the myelin sheath insulates and speeds up nerve impulses. Synapses allow neurons to transmit electrical signals to other neurons through the release of neurotransmitters.
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The document provides an overview of the nervous system, including its main components and functions. It discusses the central nervous system (CNS), peripheral nervous system (PNS), and neurons. The three main functions of the nervous system are to receive stimuli, integrate input, and respond to stimuli. The CNS includes the brain and spinal cord, while the PNS links the CNS to receptors and effectors. Neurons transmit signals through electrical and chemical processes. The document also describes the pathways of nervous transmission and different types of neurons and reflexes.
Types of neuron
Neurons are the basic structural and functional units of the nervous system. There are three main types of neurons: motor neurons carry signals from the central nervous system to the muscles and glands, sensory neurons carry signals from receptors in the body into the central nervous system, and interneurons connect neurons within the brain and spinal cord to pass information between motor and sensory neurons.
Nerve cell
Neurons are electrically excitable cells that transmit information through electrical and chemical signals. They have a cell body, dendrites, and an axon. Neurons come in different shapes and sizes and can be classified by their morphology and function. They can be afferent neurons that convey sensory information into the central nervous system, efferent neurons that transmit signals from the central nervous system to effector cells, or interneurons that connect neurons within the central nervous system. Neurons can also be classified by their electrophysiological characteristics, such as being tonic, phasic, or fast spiking. Neurons affect other neurons by releasing neurotransmitters that bind to receptors on postsynaptic neurons.
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The sensory system enables perception of changes in the external and internal environment through three departments - peripheral, conducting, and central. The peripheral department contains receptors that code information and perform primary analysis. The conducting department conveys impulses to the cortex and performs secondary analysis through reflexes. The central/cortex department enables higher-level analyses and perceptions. Receptors are classified based on their mechanism, location, stimulus type, and sensations caused. Coding of information in receptors uses a binary code to represent parameters like force, duration, and thresholds of sensitivity.
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The document discusses the autonomic nervous system and neuromuscular blockade. It defines the two divisions of the autonomic nervous system as the sympathetic and parasympathetic nervous systems. It also describes autonomic hyperreflexia, its symptoms, and management strategies. The document further discusses the neuromuscular junction, types of neuromuscular blockers, and symptoms of cholinergic crisis.
Y2 s1 introduction to the nervous system
The document provides an introduction to the nervous system. It discusses that the nervous system controls and coordinates the activities of the body through electrical and chemical signals. It is comprised of the central nervous system (brain and spinal cord) and peripheral nervous system. The nervous system has several functions including sensation, movement, integration of sensory information, and higher cognitive functions. It also discusses the different parts of the brain and spinal cord as well as the peripheral and autonomic nervous systems.
A.n.s intro by varun
The document provides an introduction to the autonomic nervous system (ANS) including its three main divisions - the sympathetic, parasympathetic, and enteric nervous systems. It discusses the classification of the nervous system into the central nervous system and peripheral nervous system. The peripheral nervous system consists of the somatic and autonomic nervous systems. The autonomic nervous system is further divided based on neurotransmitters, ganglia locations, and organ innervation between the sympathetic and parasympathetic divisions.
Chapter15 autonomicns marieb
The document discusses the structures and functions of the sympathetic and parasympathetic divisions of the autonomic nervous system, including their neurotransmitters, levels of integration, and comparison to the somatic nervous system. It provides details on the pathways, ganglia, effects, and dual innervation of organs by both divisions of the ANS. Key differences between the sympathetic and parasympathetic divisions are emphasized such as their locations in the CNS, neurotransmitters, and roles in fight or flight versus rest and digest responses.
Nerve conduction study
Nerve conduction studies test the function of motor and sensory nerves by measuring nerve conduction velocity. Small electrical stimuli are applied to nerves while recordings are made from muscles. Abnormalities may indicate conditions like peripheral neuropathy or radiculopathy. The test evaluates nerves like the median and ulnar nerves and can help diagnose disorders affecting the peripheral nervous system.
Nervous system introduction
The document provides an overview of the nervous system including:
- The central nervous system (CNS) which includes the brain and spinal cord.
- The peripheral nervous system (PNS) which connects the CNS to other parts of the body and includes nerves and ganglia.
- The autonomic nervous system which regulates involuntary body functions and has sympathetic and parasympathetic divisions.
- Neurons, the basic cellular units of the nervous system, and neuroglia which support neuronal functions. Key parts of neurons and different neuron types are described.
Anatomy lab. 7 nervous sys.
The nervous system controls and coordinates the body's activities. It has two main parts:
1. The central nervous system (CNS) consisting of the brain and spinal cord which acts as the control center.
2. The peripheral nervous system (PNS) consisting of nerves that connect the CNS to the rest of the body and allows communication.
The nervous system receives sensory input, integrates the information, and causes motor responses via output from the CNS to muscles and glands. It works through neurons, which are specialized cells that transmit electrochemical signals, and neurotransmitters which allow communication between neurons.
Neural-control-of-exercises-muscles.pptx
The document discusses the central nervous system and its control of exercise and muscle movement. It explains that the central nervous system, made up of the brain and spinal cord, controls all of the body's functions through neural pathways. Neurons transmit signals as electrochemical impulses between the central nervous system and peripheral nerves, as well as between neurons at synaptic junctions. These signals control both voluntary and involuntary muscle movement and functions.
Chapter14 peripheralns marieb
The peripheral nervous system consists of sensory receptors, motor endings, and four plexuses that blend spinal nerve fibers. It includes 12 pairs of cranial nerves that connect to the brain and spinal nerves that carry sensory and motor fibers through vertebral openings. The peripheral nervous system detects stimuli and activates effector responses through reflexes and voluntary motor control. It transmits signals between the central and peripheral parts of the body.
lesson of mr chips chosoo
The document discusses the anatomy and physiology of the autonomic nervous system. It begins by describing the basic anatomy of the nervous system and defining the central, peripheral, somatic, and autonomic nervous systems. It then explains key differences in the pathways of the somatic and autonomic systems, such as autonomic pathways involving two neurons and peripheral ganglia. The document goes on to describe the specific origins and targets of the sympathetic and parasympathetic divisions before explaining their opposing physiological functions in various organs. It concludes by discussing the neurotransmitters and receptors involved in autonomic signaling.
Nervous system
The spinal cord or medulla is part of the central nervous system that extends from the foramen magnum to the lower back and has a cervical and lumbar enlargement. It has 31 segments and is surrounded by meninges. Internally, it contains grey matter in an H-shaped column with neuronal groups, and white matter organized into dorsal, lateral, and ventral funiculi containing ascending and descending tracts. The spinal cord transmits information between the brain and body and facilitates reflexes via its grey matter.
F:\Biology Form 5\Chp 3 Coordination And Response\3 2 The Role Of The Human N...
The document summarizes the key roles and functions of the human nervous system. It discusses how the nervous system is organized into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS includes the brain and spinal cord, which process sensory information, coordinate functions, and initiate motor responses. The PNS connects the CNS to receptors and effectors through nerves. Within the nervous system, neurons transmit signals as nerve impulses between the CNS, receptors, and effectors to coordinate senses, movement, and homeostasis.
AUTONOMIC NERVOUS SYSTEM.pptx
This document provides an overview of the autonomic nervous system (ANS). It notes that the ANS connects the central nervous system to smooth muscle, cardiac muscle and glands to control visceral functions. It is divided into the parasympathetic and sympathetic divisions. The parasympathetic nervous system is associated with rest and digestion and uses acetylcholine as its neurotransmitter. The sympathetic nervous system is associated with fight or flight responses and uses norepinephrine as its neurotransmitter. The document discusses the anatomy and functions of both divisions in more detail.
01 nerve singnal processing
This document provides an overview of key topics related to the nervous system, including:
1. It introduces the organization of the nervous system and discusses nerve signal processing, sensory processing, motor control, consciousness, cognition, development, and recent advances.
2. It examines the structure and function of nerve cells, ion distribution and movement across cell membranes, giant nerve cells, resting membrane potential, and the action potential.
3. It explores the propagation of action potentials, saltatory conduction, the refractory period, electrical and chemical synapses, neurotransmitter release, postsynaptic receptors, and excitatory and inhibitory postsynaptic potentials.
ระบบประสาท
The document provides an overview of the nervous system, including its main components and functions. It discusses the different types of neurons, the central nervous system which includes the brain and spinal cord, the peripheral nervous system, and the somatic and autonomic nervous systems. It also describes the key parts and regions of the brain and spinal cord, and how they work together to control functions of the body and respond to internal and external stimuli.
ANS.pptx
The autonomic nervous system (ANS) controls involuntary functions like digestion and heart rate. It is divided into the sympathetic and parasympathetic systems. The sympathetic system activates the fight or flight response using norepinephrine. The parasympathetic system calms the body and activates rest and digest functions using acetylcholine. Both systems have preganglionic and postganglionic neurons. The document discusses the anatomy and functions of the ANS in detail.
Neurones topic 8 gray matter
The document discusses the structure and function of the nervous system. It describes the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system, which includes nerves connecting the CNS to receptors and effectors. It explains how nerve impulses are transmitted through neurons to coordinate responses. The three main types of neurons - sensory, motor, and relay neurons - are compared. Reflex arcs and various reflex actions are also outlined.
response&coordination.pptx
This document provides information on coordination in mammals through the nervous system and endocrine system. It discusses:
- How the nervous system coordinates through transmission of nerve impulses between receptors and effectors via nerve fibers.
- The structure and function of the key parts of the mammalian central nervous system (CNS) including the brain, spinal cord, and neurons.
- How reflex actions and voluntary actions differ in terms of the neural pathways and levels of conscious control involved.
- How the endocrine system coordinates through hormones secreted from endocrine glands that diffuse into the bloodstream and target specific organs.
Similar to Nervous System (20)
F:\Biology Form 5\Chp 3 Coordination And Response\3 2 The Role Of The Human N...
F:\Biology Form 5\Chp 3 Coordination And Response\3 2 The Role Of The Human N...
Nervous System
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- 4. NERVOUS SYSTEM r
- 5. Sensitivity ability to respond to a stimulus. r
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- 7. BRAIN • Functions of the brain: • Interprets sensations • Determines perception • Stores memory r • Reasoning • Makes decisions • Coordinates muscular movements • Regulates visceral activities • Determines personality
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- 9. SPINAL CORD • Slender column of nervous tissue continuous with brain and brainstem • Extends downward through r vertebral canal • Begins at the foramen magnum and terminates at the first and second lumbar vertebrae (L1/L2) interspace
- 10. Function of Spinal Cord • Conduit (pathway) for nerve impulses to and from the brain and brainstem r • Center for spinal reflexes
- 11. NEURONS r
- 12. 3 Types of Neuron r
- 13. Nervous System CENTRAL PERIPHERAL Nervous System (CNS) Nervous System (PNS) r BRAIN NERVES SPINAL CORD
- 14. Sensory INPUT Integration r Motor OUTPUT
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- 16. Sensory Stimulus receptors Nerve Relay r Neuron response Motor effectors Nerve
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- 20. GROUP ACTIVITY r
- 21. Assignment Define Reflex Arc and give 2 examples of scenario showing how reflex arc works. r
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