nervs

1. NERVOUS SYSTEM
Unit 6 – Lesson 2

2. Nervous System
•Work with endocrine system
•Control and coordination of the body
•Produce thoughts
•Respond to stimuli

3. Nervous System
•Uses electric signals
•Transmit information
•Using nerve cells or neurons

4. Neurons
•Specialized cells
•Basic cell of NS
•Carries impulses
•Three main parts

6. Nervous System : Parts
•Central Nervous System
•Brain and Spinal Cord
•Peripheral Nervous System
•Neurons and Ganglia
•Endemic Nervous System
•Digestive tract

8. Central Nervous System
•Brain and spinal cord
•Production, reception and relaying of
messages

10. Brain
•Control center
•Thoughts, movement, memory, senses
•Produces impulses
•Diff. per person
•10 billion neurons

11. Skull
•Protects the brain
•Membranes underneath
•Meninges
•Cerebrospinal fluid
•Cushions brain and spine

12. Brain
•Three main regions
•Cerebrum
•Cerebellum
•Brain stem

13. Cerebrum

14. Cerebrum
•Large upper region
•Has many folds
•Two hemispheres, right and left
•Corpus callosum
•Deals with cognition

15. Corpus Callosum
•Between hemispheres
•Nerves cross over

16. Cerebrum
•4 lobes
•Frontal
•Parietal
•Temporal
•Occipital

17. Hippocampus
•memory
•Long term
•Medial temporal lobe

18. Hypothalamus – Balance
•Body temp
•Water usage
•Blood pressure
•Hormone release

19. Thalamus
•Relay station
•Process sensory
information

20. Cerebellum
•Coordinates muscle movement
•Posture
•Movement
•Balance
•Speech

21. Brain Stem
•Life support system
•Connected to spine
•Contains:
•Midbrain
•Pons
•Medulla

22. Midbrain
•Controls eye movement
•Movement of pupil
•Processing:
•Auditory
•Visual

23. Pons
•Relay messages within the brain
•Regulates breathing
•Processes sensory
information

24. Medulla
•Controls:
•Breathing
•Heartrate
•Swallowing
•Center of respiration and circulation

25. Spinal Cord
•Rod of brain tissue
•Protected by spinal column
•Serves as relay station to the PNS

28. Peripheral Nervous System
•Cranial and spinal nerves
•2 Types of Neurons
•Motor Neurons
•Sensory Neurons

29. Sensory Neurons
•Send signals to CNS
•Cranial (audition, vision, olfaction)
•Spinal (tactition, gustation…
equilibrioception, thermoception,
proprioception, nociception…)

30. Motor Neurons
•Cranial and spinal nerves
•2 subsystems
•Somatic Nervous System
•Autonomous Nervous System

31. Somatic Nervous System
•Voluntary control
•Skeletal muscles

32. Autonomous Nervous System
•Reflexes, reactions.
•Involuntary actions
•2 subdivisions
•Sympathetic
•Parasympathetic

33. Sympathetic Division
•Action and stress
•“fight or flight
•is a network of nerves that helps your body activate its
“fight-or-flight” response. This system’s activity
increases when you’re stressed, in danger or physically
active. Its effects include increasing your heart rate and
breathing ability, improving your eyesight and slowing
down processes like digestion.

34. Parasympathetic Division
•Metabolism, energy conservation.
•“Rest or Digest”
• It slows the heart rate and decreases blood
pressure. It stimulates the digestive tract to
process food and eliminate waste. Energy
from processed food is used to restore and
build tissues.

35. NS
CNS PNS
Brain Spine
Moto
r
Sense
SNS ANS
SD PD

36. DISEASES OF THE
NERVOUS
SYSTEM
Unit 6 – Lesson 2

37. Diseases of the Nervous System
•Some common diseases:
•Meningitis
•Cerebral Palsy
•Parkinson’s Disease
•Brain Tumor
•Epilepsy
•Multiple Sclerosis

38. Meningitis
•Infection of meninges
•Bacterial or viral
•Treatment
•antibiotics

40. Cerebral Palsy
•Disorder, lack muscle control
•Cause:
•Abnormal brain development
•Infection during pregnancy

41. Cerebral Palsy
•Symptoms:
•Seizures
•Intellectual disability
•Lack of muscle movement
•Treatment:
•Surgery, then Therapy

42. Parkinson’s Disease
•Disorder, affects movement
•Gradual development
•Cause:
•Genetics

43. Parkinson’s Disease
•Symptoms:
•Seizures, weak senses
•Lack of muscle control
•Treatment:
•No cure, surgery to improve condition

45. Brain Tumor
•Benign or malignant (cancerous)
•2 types:
•Meningeal (in meninges)
•Metastatic (from other tumors)

46. Brain Tumor
•Symptoms:
•Trouble walking
•Change of mental status
•Treatment:
•Surgery, Radio and Chemotherapy

47. Epilepsy
•Disorder, nerves act abnormally
•Recurring seizures
•Strange sensations, emotions and behavior

48. Epilepsy
•Causes:
•Symptom of other diseases
•Head trauma
•Treatment:
•Drug therapy (anticonvulsant)

49. Multiple Sclerosis
•Autoimmune disease
•Immune system attacks neurons
•Destroys myelin sheath
•No definite cause

50. Multiple Sclerosis
•Symptoms
•Vision problems
•Tingling, numbness, pain, fatigue
•Motor difficulties
•Treatment
•No cure