The document summarizes key concepts about the nervous system including:
- Neurons are the basic structural and functional units that transmit electrochemical signals called nerve impulses. Nerves are bundles of axons.
- The central nervous system (CNS) contains gray matter with neuron cell bodies and unmyelinated axons, and white matter with bundles of myelinated axons.
- There are three main types of neurons - sensory, interneurons, and motor neurons. Neuroglial cells provide support and insulation for neurons in the CNS.
- The peripheral nervous system connects the CNS to other body parts and allows sensory input, integrative processing, and motor output functions.
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THIS REFER BY THE ESSENTIALS OF MEDICAL PHYSIOLOGY BOOK (SIX EDITION)
HELLO!
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STUDENT OF A PHYSIOTHERAPY.
THIS IS MY COLLEGE PROJECT . I'M SHARING TO STUDENT LIKE ME..
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This PowerPoint Review Game is one very small part of a larger science unit from www.sciencepowerpoint.com. This unit comes with a bundled homework package, detailed lesson notes, worksheets, review games, and much more. The Human Body Systems and Health Topics Unit uses a 13 Part 8,500 slide interactive PowerPoint full of critical class notes, review opportunities, video and academic links, and much more to deliver an entire unit of study. Learn more at www.sciencepowerpoint.com
I don't play this game like Jeop_ _ dy, instead, students record the answers 1-25 as they work in small table groups. Each question 1-20 is worth 5 pts while 20-25 are all bonus questions worth 1 pt each and for fun. The final question is a 5 point wager question. The answers are provided after the review in PowerPoint form so the students can self-assess. The questions are previewed one last time before the answers are revealed so the teacher can call upon table groups or individual students for the answer. This is just one of the review games provided in the unit described below.
These slides contain the basic information and principle of nervous transduction, It also includes the information about the type of the neurons, structure of the neuron, resting and active membrane potential, synapes and events occurring in it, and introduction to the neurotransmitters.
basic nervous system-CNS-PNS -cell bodie- axon-dendron-grye matter- white mat...shailesh sangle
The nervous system is a complex network of cells, tissues, and organs that coordinates and regulates the body's responses to internal and external stimuli. It is responsible for the control and coordination of all the body's functions, including movement, sensation, thought, and behavior.
The nervous system can be divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, while the PNS consists of all the nerves that extend from the CNS to the rest of the body.
The nervous system is made up of different types of cells, including neurons and glial cells. Neurons are specialized cells that transmit signals through the body in the form of electrical impulses. Glial cells, on the other hand, support and protect the neurons and help maintain the proper functioning of the nervous system.
The nervous system is responsible for many vital functions, including:
Sensory processing: The nervous system receives sensory information from the environment and the body's internal organs, and processes and interprets this information to generate appropriate responses.
Motor control: The nervous system controls the muscles and other organs of the body to produce movement and other responses.
Cognitive functions: The nervous system is responsible for the processes of learning, memory, language, and other complex mental activities.
Autonomic functions: The nervous system regulates the body's automatic functions, such as breathing, heart rate, digestion, and other bodily processes that are not under conscious control.
Overall, the nervous system is a complex and intricate system that plays a critical role in maintaining the body's homeostasis and overall well-being.
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COORDINATION 1
Coordination is a linking together of the functions of different organs so that they work at a fine time and rate required by the body.
Coordination is achieved through a nervous and endocrine or hormonal system.
DIFFERENCE BETWEEN NERVOUS AND ENDOCRINE
The following power point presentation talks about neural control and coordination in humans. In this, we study about neurons, the conduction of nerve impulse, about Central Nervous System and also about sense organs
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Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
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Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
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Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
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https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
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In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
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Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
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JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
2. NEURONS
Structural and functional units of the nervous system.
React to physical and chemical changes in their
surroundings.
Transmit information in the form of electrochemical
changes called nerve impules.
5. WHITE MATTER VS GRAY MATTER
Myelinated axons appear white and masses of
these axons form the white matter in the CNS.
Unmyelinated axons and neuron cell bodies form
gray matter in the CNS.
6.
7. TYPES OF NEURONS
Sensory Neurons (afferent)- carry nerve impulses
from peripheral body part into the brain or spinal
cord.
Interneurons (association) – lie within the brain or
spinal cord and link other neurons. Transmit
impulses from one part of the brian or spinal cord to
another.
Motor Neurons (efferent) – carry nerve impulses out
of the brain or spinal cord to effectors. Muscles
contract, glands to release secretions.
8. NEUROGLIAL CELLS
Provide physical support, insulation, and nutrients
for neurons.
Before birth, neuroglial cells release and relay
signals that guide the differentiation of neurons.
Oligodendrocytes – provide myelin sheath around
axons in CNS
Astrocytes – found between neurons and blood
vessels – provide nutrients and ions
Microglial cells – scattered throughout CNS and are
the “garbage trucks” phagocytizing bacterial cells
and cellular debris
10. CNS VS PNS
CNS – brain and spinal cord.
PNS – composed of peripheral nerves that connect
the CNS to the other body parts.
Together the CNS and PNS provide 3 functions:
sensory, integrative, and motor.
Motor Division of the PNS is somatic sending info to
the skeletal muscles and autonomic sending info to
the smooth and cardiac muscles.
11. SENSORY FUNCTION OF NS
Sensory receptors are a the ends of peripheral
neurons.
Gather info by detecting changes inside and
outside the body.
Sensory receptors convert environmental info into
nerve impulses.
Nerve impulses are transmitted over P nerves to
the CNS.
12. INTEGRATIVE FUNCTION
Signals are brought together creating sensations,
adding to memory, help produce thoughts that
translate sensations in perceptions.
As a result of integration we make conscious or
subconscious decisions.
The we use MOTOR functions to act on them.
13. MOTOR FUNCTIONS
Use P neurons to carry impulses from the DNS to
responsive structures called effectors.
Effectors are OUTSIDE the NS and include
muscles and glands.
14. NERVE IMPULSES
Travel along complex nerve pathways.
Synapse is the junction between any two
communicating neurons.
Neurons at a synapse ARE NOT in direct physical
contact, they are separated by a gap.
The gap is called a synaptic cleft.
Communication must cross the gap.
15.
16. SYNAPTIC TRANSMISSION
One way process carried out by neurotransmitters.
Distal ends of axons have one or more synaptic
knobs with can sacs called synaptic vesicles.
Nerve impulse reaches synaptic knob some
synaptic vesicles release neurotransmitters.
Neurotransmitter diffuses across the synaptic cleft
and reacts with specific receptors on the
postsynaptic neuron membrane.
18. CELL MEMBRANE POTENTIAL
The surface of a cell membrane is usually
electrically charged = polarized (in respect to the
inside of the cell)
Polarized because of unequal distribution of
positive and negative ions between sides of the
membrane.
Important to the conduction of muscle and nerve
impulses!!
19. NERVE IMPULSE
Is formed by a change in the neuron membrane
polarization and return to the resting state.
20. DISTRIBUTION OF IONS
Potassium ions pass through cell membrane more
easily than sodium ions.
Pumps in cell membrane work to pump sodium ions
out of cell and potassium ions into cell to create a
concentration gradient.
Sodium is pumped out of cell, potassium is pumped
into cell.
21. RESTING POTENTIAL
A resting cell membrane is more permeable to
potassium ions than to sodium ions.
Potassium ions diffuse out more quickly than
sodium ions.
Outside of cell membrane gains a slight surplus of
positive charges and inside is left with slight
negative charge.
Difference in charge between 2 regions is called
potential difference.
22. RESTING POTENTIAL -70MV
The difference in electrical charge between the
inside and the outside of an undisturbed nerve cell
membrane.
23. POTENTIAL CHANGES
Changes (stimuli) affect the resting potential in a
particular region of a nerve cell membrane.
If the membrane’s resting potential decreases
(inside of membrane becomes less negative when
compared to the outside) it is DEPOLARIZED.
The greater the stimulus the greater the
depolarization.
24. THRESHOLD POTENTIAL -55MV
If neurons are depolarized sufficiently, the
membrane reaches a level called the threshold
potential.
At the TP permeability suddenly changes at the
trigger zone.
Channels open and allow sodium ions to diffuse
freely INWARD.
Membrane loses it negative electrical charge and
becomes depolarized.
25. HANG IN THERE, I KNOW THIS STUFF ISN’T
EASY TO UNDERSTAND.
Membrane channels open that allow potassium
ions to pass through and as these positive ions
diffuse OUTWARD.
The inside of the membrane becomes negatively
charged once more.
Membrane potential may briefly come overly
negative (hyperpolarization).
Membrane quickly returns to resting potential
(repolarization)
Remains in this state until stimulated again.
26. RAPID SEQUENCE OF DEPOLARIZATION AND
REPOLARIZATION IS THE ACTION POTENTIAL
If threshold is reached, an action potential results.
Action Potential is the basis for the nerve impulse.
Only a fraction of sodium and potassium ions move
through the membrane during an AP.
Many AP can occur and RP’s be reestablished.
27.
28. NERVE IMPULSES
AP occurs in one region of a nerve cell membrane
and causes a bioelectric current to flow to adjacent
portions of the membrane.
Local current stimulates the adjacent membrane to
its threshold level and triggers another AP.
This stimulates the net adjacent region.
A wave of Ap’s moves down the axon to the end.
This propagation of AP’s along a nerve axon
constitutes the nerve impulse.
29. EVENTS LEADING TO THE CONDUCTION OF A
NERVE IMPULSE (TABLE 9.1. PG224)
1. Neuron membrane maintains RP
2. Threshold stimulus is reached
3. Sodium channels in trigger zone open
4. Sodium ions diffuse inward, depolarization
5. Potassium channels open
6. Potassium ions diffuse outward, repolarization
7. AP causes current, stimulates adjacent portions
8. Wave of AP’s travel length of axon as nerve
impulse.
30. IMPULSE CONDUCTION
Speed of nerve impulse conduction is proportional
to the diameter of the axon – the greater the
diameter the faster the impulse.
Unmyelinated axons have smaller diameter and
conduct impulse over its entire surface.
Myelinated axons have larger diameter (think about
thickness of Schwann cells) and conduct impulses
faster.
31. SALTATORY IMPULSE CONDUCTION
Myelin insulates and prevents almost all ion flow
through the membrane it encloses.
Nodes of Ranvier between Schwann cells interrupt
the myelin sheath.
AP’s occur at the nodes (exposed axon has sodium
and potassium channels)
A nerve impulse traveling along myelinated axon
appears to jump from node to node (saltatory)
Many times faster than conduction on an
unmyelinated axon.
32. ALL-OR-NONE RESPONSE
Nerve impulse conduction is all or none
If a neuron responds at all it responds completely
A nerve impulse is conducted whenever a stimulus
of threshold intensity or above is applied to an
axon.
Higher intensity = more rapid impulses per second.
ALL impulses carried on an axon are of the same
strength.
33. REFRACTORY PERIOD
For a very short time after a nerve impulse, a
threshold stimulus will not trigger another impulse
on an axon.
This limits the frequency of impulses in a neuron.
Also ensures impulse proceeds in only one
direction -> down the axon.
Frequency of 700 impulses per second possible but
100 per second is more common