Ch. 18

Question 1

The structures in the brain that appear anechoic on a sonogram are the
a.four ventricles; cavum septum pellucidum and cavum vergae; tentorium; formamen of Monro
b. four ventricles; cavum septum pellucidum and cavum vergae; cisterna magnum; foramen of Monro
c.four ventricles; cavum septum pellucidum and cavum vergae; cisterna magnum; corpus callosum
d.four ventricles; cavum septum pellucidum and cavum vergae; cisterna magnum; tentorium

Answer 1

b. four ventricles; cavum septum pellucidum and cavum vergae; cisterna magnum; foramen of Monro

Question 2

The two curvilinear, bright structures that arch around the thalami anteriorly from the floor of the body of the lateral ventricle and posteriorly to the tip of the temporal horn are the
a. corpus callosum
b. caudate nucleus
c. thalamus
d. choroid plexus

Answer 2

d.choroid plexus

Question 3

The midline falx is
a. the echogenic portion of the cerebellum
b. the channel that connects the third and fourth ventricles
c. the interhemispheric fissure
d.a fold of dura mater that lies in the interhemisperic fissure.

Answer 3

d. a fold of dura mater that lies in the interhemisperic fissure.

Question 4

The brain stem consist of
a. midbrain, pons, medulla oblongata
b. midbrain, pons, cerebellum, medulla oblongata
c. midbrain, pons, cerebellum
d. aqueduct of Sylvius, cerebellum, medulla oblongata, caudate nucleus

Answer 4

midbrain, pons, medulla oblongata

Question 5

The linear, echogenic structure seen at the midline of the cerebrum is the
a. quadrigeminal plate
b. Sylvian fissure
c. caudothalamic groove
d.interhemspheric fissure

Answer 5

d.interhemspheric fissure

Question 6

The midgray, homogeneous, egg-shaped structures that lie on either side of the third ventricle are the

Answer 6

thalami

Question 7

The central echogenic portion of the otherwise midgray cerebellum is the

Answer 7

vermis

Question 8

The echogenic, spider-like fissures separating the gyri of the brain are the

Answer 8

sulci

Question 9

The four ventricles are

Answer 9

two lateral, third and fourth

Question 10

The small thin, anechoic, arrowhead-shaped midline structure that appears to project into the cerebellum is the

Answer 10

fourth ventricle

Question 11

In the cerebellum, the ____ connects the two hemisperes

Answer 11

vermis

Question 12

The ______ is a midline channel that connects the third and fourth ventricles.

Answer 12

aqueduct Sylvius

Question 13

The ______ is a midline channel that marks the communication between the lateral ventricles and third ventricle.

Answer 13

foramen of Monro

Question 14

The _______ directs CSF into into the subarachnoid space through the foramen of Magendie and foramina of Lushka.

Answer 14

fourth ventricle