Study Notes on the BRAIN - Structure & Basic Functions. Date not accurate.

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10 Feb 2011
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THE BRAIN: structure & basic functions
SPINAL CORD:
rope of neural tissue. White matter=myelinated axons, grey= somas
Capable of autonomous function!
-Communicates info to & from the rest of the body. Sensory info in
bodyspinal cordbrain
-Spinal reflex (stretch reflex: kneecap tendon)
BRAINSTEM:
(above spinal cord, in front of cerebellum)
also capable of autonomous function!
-basic programs of survival: breathing swallowing urinating orgasm
vomiting
-like the spinal cord of the head: gagging reflex= similar to spinal cords
stretch reflex
-reticular formation: networks of neurons which project into the
CEREBRAL CORTEX & affect arousal.
CEREBELLUM:
~MOVEMENT~
(connected to back of brainstem)
All parts = identical in cellular organization, but performing different
functions identical operations on all its inputs, different effects resulting
from diff origins & destinations of info.
-motor learning: operates independently of the rest of the brain,
unconsciously (ex: bike riding while thinking of other stuff, playing the piano
without thinking about it)
-balance: damage to nodes @ bottom head tilt, balance probs, loss of
smooth compensation of eye position when head is moving (ex: when you
run, your head bobs up and down but the world seems to stay still,
NORMALLY)
-coordination: damage to the lobes on each side loss of limb coordination
-other: damage to back ridge affects walking
*ATAXIA: disorder of the cerebellum. Clumsiness, loss of motor
coordination, lack of normal emotional responses & impaired cognitio.
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Document Summary

Communicates info to & from the rest of the body. Brainstem : (above spinal cord, in front of cerebellum) also capable of autonomous function! Basic programs of survival: breathing swallowing urinating orgasm vomiting. Like the spinal cord of the head: gagging reflex= similar to spinal cord"s stretch reflex. Reticular formation: networks of neurons which project into the. All parts = identical in cellular organization, but performing different functions identical operations on all its inputs, different effects resulting from diff origins & destinations of info. Motor learning: operates independently of the rest of the brain, unconsciously (ex: bike riding while thinking of other stuff, playing the piano without thinking about it) Balance: damage to nodes @ bottom head tilt, balance probs, loss of. Smooth compensation of eye position when head is moving (ex: when you run, your head bobs up and down but the world seems to stay still,

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