Nervous System 3- Brain and Brain Stem Flashcards Preview

Anatomy FINAL > Nervous System 3- Brain and Brain Stem > Flashcards

Flashcards in Nervous System 3- Brain and Brain Stem Deck (40):
1

what does gray matter consist of?

unmyelinated neurons
cell bodies
synapses

2

the pre central and post central gyri are separated by

central sulcus

3

what is the central sulcus

separating the parietal lobe from the frontal lobe and the primary motor cortex from the primary sensory cortex

4

primary motor cortex has a ____ organization

contralateral

5

Cerebral Hemispheres/ Cerebral Cortex

frontal, parietal, temporal,
occipital, insula lobes

6

Basal ganglia

caudate nucleus, putamen,
globus pallidus, substantia
nigra and subthalamic
nucleus

7

Diencephalon

thalamus , hypothalamus

8

Brain Stem

midbrain, pons, medulla
oblongata

9

pre central gyrus

motor cortex

10

post central gyrus

sensory cortex

11

frontal cortex

– Primary Motor cortex, conscious control of skeletal muscles
– Premotor- planning movement
– Prefrontal - reasoning, planning, judgement, emotions and personality

12

Parietal

Primary sensory cortex, touch, pressure,
temp, pain, vibration, orientation, recognition

13

True or False
The Parietal Cortex is responsible for taste

false

14

Temporal

auditory and olfactory, speech/language, (receptive), memory, emotions

15

occipital

visual cortex

16

Insula

visceral sensation and control taste

17

What are the 3 phases of voluntary movement?

1) Identification and localization of a target
2) Plan of action
3) Execution

18

What happens in " Identification and localization of a target"

specific sensory areas relay info to POSTERIOR PARIETAL LOBE

19

What happens in "plans of action"

specific area in FRONTAL LOBE (premotor areas) plans movement

20

What is the role and function of the basal ganglia?

creates a basis for movement control-regulates level of activity in motor cortex
; also non-motor functions
– cognitive, limbic (emotions)

21

What are some basal ganglia disorders?

Parkinson's disease (motor cortex is understimulated)
Huntingtons's disease (motor cortex is over stimulated )

22

overstimulated moto cortex causes death to what

putamen cells

23

cerebellum function

motor control function such as fine tuning, and timing of voluntary movements rapid motor adjustments for balance and equilibrium

24

you were playing badminton and someone hits you in the head with a racquet right on the cerebellum. It damages your cerebellum. What is going to happen

Impaired coordination, you cant hit the birdie.
Impaired balance, you cant stand up to hit a birdie.
But you can still feel the pain when you get hit by a birdie. And you still have your muscle strength

25

Thalamas (relay station): What is filtered in the thalamus?

sensory info being directly transmitted to the cortex

26

Two thalami are separated by _____ ventricle

3rd ventricle

27

Thalamus is connected by ____

interthalamatic adhesion

28

simple definition of thalamus function

relay of processing centre for sensory info

29

Hypothalamus link to ____

link to pituitary gland-primary link to endocrine system and autonomic
functions

30

Hypothalamus controls ____

Controlling emotion, autonomic functions and hormone production

31

Pons (bridge) connect ___to ____

connects brain stem to cerebellum

32

mesencephalon location

in the midbrain

33

mesencephalon function

-process visual and auditory data
-generation of reflexive somatic motor response
-maintenance of consciousness

34

Pons function

-relay sensory info to cerebellum and thalamus
-subconscious somatic and visceral motor centres

35

medulla oblongata function

relay sensory info to thalamus and other portions of brain stem,
regulation of visceral functions (heart, lungs, digestion, )

36

If stroke is in the right side of the cortex, it affects ___ side of the body

contralateral

37

an ascending pathway carries

sensory info to the central nervous system

38

A nerve pathway that goes down the spinal cord and allows the brain to control movement of the body below the head

descending pathway

39

white matter

myelinated axons with reverse organization of spinal cord

40

homunculus /mini human

distortions in the size representation is due to innervation density (sensory) or number of output cells (motor)
devoted to that body part/region