1. Neurons, Hormones, and the Brain
Chapter #4

2. Overview The nervous system Communication in the nervous system
chapter 4
Overview
The nervous system
Communication in the nervous system
Mapping the brain
A tour through the brain
The two hemispheres of the brain
Two stubborn issues in brain research

3. Objectives
Explain the functions and components of the Central Nervous system
Compare and Contrast the Peripheral Nervous system and the CNS; including Sensory and Motor neurons
Create a Flow chart of the nervous system=ACADEMIC SKILL ALERT

4. Nervous System: A Basic Blueprint
Neuropsychology- or Neuroanatomy-study the brain and the rest of the nervous system in hopes of gaining a better understanding of consciousness, perception, memory, emotion, stress, mental disorders and self identity
Cells, parts and functions of Neurons

5. Neuropsychology

6. Central Nervous System= 2 parts
Brain and spinal cord
Spinal cord- Extension of the brain
Runs from the base of the brain down the center of the back
Protected by a column of bones, spinal column
Bridge between the brain and the parts of the body below the neck

7. The central nervous system
chapter 4
The central nervous system
Brain
Spinal cord
A collection of neurons and supportive tissue running from the base of the brain down the center of the back
Protected by spinal column

8. Central N.S.

9. CSN= cont… Spinal reflexes- automatic behaviors, no conscious effort
For example touch hot iron, move your hand without thinking
React to Dr. hitting knee

10. Spinal Reflexes

11. Spinal reflexes cont…
Neural circuits linked to neural pathways that run up and down the spinal cord= 2 and from the brain, As a result reflexes effected by thoughts and emotions
For example erection in men
However you can control your knee from jerking when it is tapped; and most men can learn to voluntarily delay ejaculation (another spinal reflex)

12. Peripheral nervous system- second part
Handles CNS input and output
Nerves on outside brain and spinal cord
fingers, toes, receiver on radio
Sensory nerves- Carry messages from skin, muscles, to spinal cord then brain
Motor Nerves- Carry orders from CNS to muscles, glands, internal organs. Allow us to move, secrete substances like chemical messengers-Hormones.

14. Hormones

15. Organization of the nervous system
chapter 4
Organization of the nervous system

16. Peripheral Nervous system: two parts
Somatic-bodily
Autonomic- (self-governing)
Somatic Nervous system, Skeletal nervous system.
Connected to sensory receptors and to the skeletal muscles, permit voluntary actions
F.E. bug on arm, write name, turn on lights= somatic system active

17. Compare and Contrast

18. Autonomic Nervous System
Autonomic- (self-governing)
Regulates blood vessels
Internal, bladder, stomach, heart
See hot –guy/girl hands sweat, heart pounds
Automatically, without your control
Autonomic in 2 parts as well

19. Work together in opposing ways
Sympathetic nervous system- like accelerator in car. Output, energy. Blush, sweat, pushes up HR/ BP
Parasympathetic- More like a brake, conserve and store energy. Slows HR down

20. Compare and Contrast

21. Summary
Main components of CNS
Peripheral nervous system