02/07/08 Lecture Notes

Lecture - Thursday February 7th I The Brain Spinal Cord a Function i Relays messages to/from the brain b About 10 billions neurons c Spinal

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Thursday, February 7 th The Brain I. Spinal Cord a. Function: i. Relays messages to/from the brain b. About 10 billions neurons c. Spinal reflexes i. Some things can get reactions without traveling all the way to the brain ii. No voluntary control over these iii. Ex. Patellar tendon reflex d. Neurons in/out of spinal cord are in about same vertical order as the destinations i. Optimizes travel time (impulses travel in real time) ii. Injuries to spine will cut off parts of body below that e. Babies are bon with many more reflexes than adults i. Because they lack the sophisticated kind of reactions in brain ii. Disappears at 3-4 months old f. Central Pattern Generators i. Type of spinal reflex ii. Programmed set of recurring movements executed by nerves of spinal cord iii. Examples 1. dog’s leg twitching while dreaming of running, how horses have a pattern of foot/leg movement at different speeds, place on dogs where if you scratch it, their leg moves II. Brain Stem a. Function: breathing, swallowing, vomiting, urination, orgasm, most reflexes i. Basic survival requirements b. Adaptive because it is buried and protected so deeply c. Thought to be one of the first parts developed evolutionally III. Cerebellum a. Function: basic/all motor functions- automatic functions i. Examples 1. piano- don’t need to consciously think about each key 2. driving- don’t have to look for where the turn signal is b. Location: hindbrain region
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This note was uploaded on 04/17/2008 for the course PSY 151 taught by Professor Silman during the Spring '08 term at Wake Forest.

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Lecture - Thursday February 7th I The Brain Spinal Cord a Function i Relays messages to/from the brain b About 10 billions neurons c Spinal

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