Gross Anatomy of the Brain

Question 1

True or False The major lobes of the brain are named for the overlying bones of the skull. Although the boundaries of the various lobes as seen in the gross specimen are somewhat arbitrary, cortical areas in each lobe are histologically distinctive.

Answer 1

True Carpenter p24

Question 2

this structure begins inferiorly and obliquely posterior separating the frontal and temporal lobes. caudally it separates portions of the parietal and temporal lobes

Answer 2

Lateral Sulcus

Question 3

prominent sulcus running from the superior margin of the hemisphere downward and forward toward the lateral sulcus

Answer 3

Central Sulcus

Question 4

largest of all the lobes of the brain 1/3 of hemispheric surface

Answer 4

Frontal Lobe

Question 5

four principal convolutions of the Frontal Lobe

Answer 5

Precentral gyrus Suprior, Middle, and Inferior Frontal gyri

Question 6

anterior boundary of precentral gyrus

Answer 6

precentral sulcus

Question 7

subdivisions of the Inferior Frontal Gyrus

Answer 7

Pars orbitale

pars triangularis

pars opercularis

the last 2 comprises the Broca’s area of speech

Question 8

3 parts of parietal lobe

Answer 8

1. postcentral gyrus
2. superior parietal lobules
3. inferior parietal lobule

Question 9

the intraparietal sulcus separated which two parts of the parietal lobe

Answer 9

superior and inferior parietal lobule

Question 10

what are the two gyri of the infeior parietal lobules

Answer 10

supramarginal

angular

Question 11

this lobe lies inferior to the lateral sulcus

Answer 11

temporal lobe

Question 12

3 gyri of temporal lobe

Answer 12

superior

middle

inferior

temporl gyri

Question 13

identify the ffg parts

Answer 13

inferior temporal gyrus

fusiform gyrus

parahippocampal gyrus

lingual gyrus

Question 14

what constitutes the primary olfactory cortex

Answer 14

parahippocampal gyrus

uncus

lateral stria

(pyriform lobe)

Question 15

the calcarine sulcus separates what parts

Answer 15

cuneus

lingual gyrus

Question 16

Different parts of the corpus callosum

Answer 16

rostrum

genu

body

splenium

Question 17

identify the parts

Answer 17

Question 18

The limbic lobe includes: (5)

Answer 18

subcallosal, cingulate, parahippocampal gyri

primitive cortical derivatives: hippocampal formation, dentate gyrus

Question 19

True or False

The parahippocapal gyrus is derectly continuous with the cingulate gyrus.

Answer 19

True.

p31

connected by a narrow strip of cortex, posterior and inferior tot he splenium of the corpus callosum known as the isthmus of cingulate gyrus

Question 20

Myelinated fibers within the white matter are of 3 types

Answer 20

1. projection fibers - convey impulses either from or to cortex
2. association fibers - interconnect various cortical regions of the same hemisphere
3. commissural fibers - interconnect corresponding cortical regions of teh two hemispheres

Question 21

anterior limb of internal capsule separates (2)

Answer 21

caudat and putamen

Question 22

Long association fibers (3)

Answer 22

unicinate fasciculus

arcuate fasciculus

cingulum

Question 23

compact bundle beneath the insula that connects the orbital frontal gyri with anterior portions of the temporal lobe

deeply placed part of this fasciculus is htought to connect the frontal and occipital lobes

Answer 23

Unicnate Fasciculus

inferior occipitofrontal fasciculus

Question 24

sweeps around the insular region

fan-shaped ends connect the superior and middle frotal gyri with parts of the temporal lobe

a group of superiorly situated fibers in this bundle extends caudally into portions of the parietal and occipital lobe and is known as

Answer 24

Arcuate Fasciculus

Superior longitudinal fasciculus

Question 25

the principal association bundle on the medial aspect of the hemisphere

lies in the white matter of cingulate gyrus

this bundle contains fibers of variable length that connect medial regions of the frontal and parietal lobes with parahippocampal and adjacent temporla regions

Answer 25

Cingulum

Question 26

broad thick plate of densely myelinated fiber sthat reciprocally inetrconect broad regions of the opposite hemisphere

Answer 26

corpus callosum

Question 27

Small compact bundle that crosess the midline rostral to the columns of the fornix

Answer 27

anterior commissure

2 parts: anterior: interconects the olfactory bulbs, on the two sides

posterior: inetrconnects regions of the midlle ad inferior temporal gyri

Question 28

parts of the basal ganglia (4)

Answer 28

caudate

putamen

globus pallidus

amygdaloid nuclear complex

Question 29

corpus striatum (3)

Answer 29

caudate

putamen

globus pallidus

Question 30

lentiform nucleus

Answer 30

putamen

globus pallidus

Question 31

largest and most lateral part of coprus striatum

lies between lateral medullary lamina of GP and the external capsule

Answer 31

Putamen

Question 32

gray cellular mass in the dorsomedial part of temporla lobe that underlies the uncus

Answer 32

Amygdaloid Nuclear Complex

Question 33

The amygdaloid complex arises from the same telencephalic anlage as the caudate nucleus. Cells of the amygdala give rise to fibers of the _________________ which arch along the entire medial border of the caudate nucleus.

Answer 33

Stria terminalis

Question 34

what structure in the rostral area, seprates the anterior horns of the fontal ventricles

Answer 34

septum pellucidum

Question 35

part of the lateral ventricle near the splenium of teh copus callosum where the body of the lateral ventricle is confluent with the temporal and occipital horns

Answer 35

collateral trigone

(atrium)