CNS and PNS

Question 1

Post central sulcus area(where):

Answer 1

> strip of cortex that runs medial to lateral

> found in both hemispheres

Question 2

POST CENTRAL SULCUS
Main responsibility:
Amount of cortex:
also called

Answer 2

SENSORY
» meaning number of neurons
» RECEIVING impulses from the body varies along the “strip”
» amount based on the number of receptors a specific area of the body has (back of neck-small amnt, face-intermediate amnt, Face-finger tips- large aunts)
»> Point to point variation

Question 3

PRE-CENTRAL SULCUS

(Where):

Answer 3

> strip of cortex that runs medial to lateral

>found in both hemispheres

Question 4

PRE CENTRAL SULCUS
Main responsibility:
Amount of cortex:
also called

Answer 4

MOTOR
>meaning number of neurons
>SENDING impulses varies along the strip
>amount is based on how much "fine control muscle" (quads-small amnt, extension), (face-moderate amnt, expressions) (fingers- large amnt, play piano)
>>>point to point variation

Question 5

Cerebellum part of:
Main functions:
Contains:
Signal starts where:

Answer 5

> brain
> coordinates and smoothes out muscle movements sequence of movements
> movements initiated by the Motor Cortex of the cerebral cortex
regulates posture and balance
»grey matter cortex and white matter axonal tracts. White matter resembles branches of tree=Arbor Vitae
> signal starts in cortex- cerebellum puts it into sequence

Question 6

Diencephalon includes:

Answer 6

Thalamus, hypothalamus

Question 7

Thalamus functions:

Flow of sensation

Answer 7

> “Gateway”- acts as a relay station
— Directs impulses from:
&raquo_space; sensory impulses(from the body) to the sensory cortex (post central sulcus area)
&raquo_space; Spinal cord and Brain
> senses picked up by body-> thalamus (directs where it goes) -> sends to whatever part of brain needs to go to

Question 8

Hypothalamus Functions:

Answer 8

> Regulates body homeostasis
1. primary controller of the pituitary gland
growth, reproduction, glucose metabolism
2. temperature control
3. thirst control
4. water/electrolyte control thru kidney