Intro to CNS

Question 1

Central Sulcus

Answer 1

Separates frontal and parietal lobe

Question 2

Lateral Sulcus

Answer 2

Separates temporal from frontal and parietal lobes

Question 3

Parietooccipital sulcus

Answer 3

separates occipital from parietal lobe (only visible from medial view)

Question 4

Each ridge is called a

Answer 4

gyrus

Question 5

sulcus

Answer 5

groove between ridges

Question 6

very deep sulci are called

Answer 6

fissures

Question 7

Limbic Lobe

Answer 7

lobe of the cerebrum only visible from the medial view

Question 8

Corpus Callosum

Answer 8

Major axonal bundles that join the 2 cerebral hemispheres

Question 9

List the major Fossae of the Cranial Cavity

Answer 9

Anterior cranial fossa, middle cranial fossa posterior cranial fossa

Question 10

Anterior cranial Fossa(location/which lobe?)

Answer 10

Above the orbit and nasal cavity, Frontal lobe fills it

Question 11

Middle Cranial Fossa (which lobe?)

Answer 11

contains the temporal lobe

Question 12

Posterior Cranial Fossa

Answer 12

Largest/deepest of the 3 fossae. Contains cerebellum and brainstem

Question 13

Tentorium Cerebelli

Answer 13

extension of dura mater that is superior to the cerebellum. It inferiorly supports the occipital lobes.

Question 14

Bones of Anterior Cranial Fossa

Answer 14

Frontal bone, Ethmoid Bone, Sphenoid Bone

Question 15

Bones of Middle cranial fossa

Answer 15

Sphenoid bone, Temporal bone

Question 16

Bones of Posterior Cranial Fossa

Answer 16

Sphenoid bone, Temporal Bone, Occipital bone

Question 17

Cerebral Cortex

Answer 17

neuronal cell bodies on OUTER surface of cerebrum “gray matter”

Question 18

White matter

Answer 18

axons, inferior to cortex

Question 19

neocortex

Answer 19

6 layer cortex, majority of human cerebral cortex

Question 20

Corona Radiata

Answer 20

radiating white matter immediately deep to the cortex that fans out like a crown

Question 21

Internal capsule

Answer 21

deep to corona radiata, deep white matter tracts that course between nuclei of the basal ganglia and thalamus

Question 22

5 Anatomical regions of internal capsule

Answer 22

Anterior limb, posterior limb, genu, retrolenticular, sublenticular

Question 23

Diencephalon

Answer 23

not visible in intact brain, includes epithalamus, thalamus hypothalamus and subthalamus. Thalamus and hypothalamus are visible with midsagittal view

Question 24

Thalamus

Answer 24

forms wall of 3rd ventricle, bilateral and highly organized, many nuclei. “Gateway” to cerebral cortex, majority of sensory and motor pathways must relay here before reaching the cortex. Cortical regions also send projections here

Question 25

Hypothalamus

Answer 25

major role in maintenance of homeostasis. Also composed of many nuclei

Question 26

cerebellum

Answer 26

recieves lots of sensory input. Projects to subcortical structures and indirectly to cortical regions. Influences motor cognitive and behavioral functions

Question 27

Rostral to caudal order of Brainstem

Answer 27

Rostral midbrain, pons, rostral medulla, caudal medulla

Question 28

Spinal cord

Answer 28

rostral spinal cord continuous with caudal medulla. Spinal nerves emerge to form peripheral nerves to carry sensory and motor info to and from the CNS

Question 29

Ventricle

Answer 29

a series of continuous spaces deep in the brain that contain cerebrospinal fluid

Question 30

List the Ventricles

Answer 30

Lateral ventricle (2), 3rd ventricle, cerebral aqueduct, 4th ventricle, central canal of spinal cord

Question 31

Layers of Meninges

Answer 31

Dura mater, arachnoid, pia mater

Question 32

Dura mater

Answer 32

external meningeal layer

Question 33

Arachnoid

Answer 33

intermediate meningeal layer

Question 34

Pia mater

Answer 34

internal meningeal layer, adheres to surface of brain and dips into sulci (the only layer to do this)