NERVOUS SYSTEM: CEREBRUM

Question 1

LAYERS OF CEREBRUM

Answer 1

GRAY MATTER-outer most layer in cerebral cortex composed mostly of neuron cell bodies
WHITE MATTER- fibers tracks deep to gray matter
//corpus callous connects hemispheres
-basal nuclei- islands of gray matter buried within white matter

Question 2

DIENCEPHALON

Answer 2

-sits on top of brain stem
-enclosed by cerebral hemispheres
MADE OF 3 PARTS
-thalamus
-hypothalamus
-epithalamus

Question 3

THALAMUS

Answer 3

-surrounds 3rd ventricle
-relay station for sensory impulses
-transfers impulses to the correct part of the cortex for localization & interpretation

Question 4

HYPOTHALAMUS

Answer 4

-under thalamus
-important autonomic nervous system center
//helps regulate body temperature
//controls water balance
//regulates metabolism
-important part of limbic system(emotions)
-pituitary gland is attaches to hypothalamus

Question 5

EPITHALAMUS

Answer 5

-forms the roof of 3rd ventricle
-houses the pineal body (endocrine gland)
-includes choroid plexus-forms cerebrospinal fluid

Question 6

BRAIN STEM

Answer 6

-attaches to spinal cord
PARTS OF BRAIN STEM
//midbrain
//pons
//medulla oblongata

Question 7

MIDBRAINS

Answer 7

-mostly composed of tracts of nerve fibers
-has 2 bulging fibers tracts-cerebral peduncles
-has 4 rounded protrusions–corpiora quadrigemina
//reflex-centers for visions & hearing

Question 8

PONS

Answer 8

-bulging center part of the brain stem
-mostly composed of fiber tracts
-includes nuclei- involved in the control of breathing

Question 9

MEDULLA OBLONGATA

Answer 9

-lowest part of brain stem
-merges into spinal cord
-includes important fiber tracts
-contains important control
//heart rate control
//blood pressure regulation
//breathing
//swallowing
//vomiting

Question 10

RETICULAR FORMATION

Answer 10

-diffuses mass of gray matter along brain stem
-involved in motor control of visceral organs
-veticular activating system (RAS) plays role in awake/sleep cycles & consciousness

Question 11

CEREBELLUM

Answer 11

-2 hemispheres with convoluted surfaces
-provides involuntary coordination of body movements