Anatomy Of The Brainstem

Question 1

The brainstem is the part of the brain that connects the

Answer 1

Cerebrum with the spinal cord

Question 2

Brainstem site

Answer 2

lies in the posterior cranial fossa

Question 3

Brainstem parts

Answer 3

Mid brain
Pons
Medulla oblongata

Question 4

Brainstem is connected to Cerebellum by

Answer 4

cerebellar peduncles

Question 5

Brainstem function

Answer 5

• Pathway of tracts between cerebral cortex & spinal cord.
• Site of origin of nuclei of cranial nerves (from 3rd to12th)

Question 6

Brainstem is responsible for

Answer 6

control of level of consciousness
perception of pain
regulation of CV & resp systems.

Question 7

Divides the medulla into 2 halves

Answer 7

Ventral median fissure

Question 8

An elevation, lies on either side of ventral median fissure

Answer 8

Pyramid

Question 9

Pyramid produced by

Answer 9

corticospinal tract

Question 10

An elevation, lies lateral to the pyramid

Answer 10

Olive

Question 11

Olive is produced by

Answer 11

inferior olivary nucleus

Question 12

Nerves emerging from Medulla _______ from
sulcus lateral to olive

Answer 12

Hypoglossal
Glossopharyngeal
vagus
accessory

Question 13

divides the closed medulla into 2 halves

Answer 13

Dorsal median sulcus

Question 14

on either side of dorsal median sulcus

Answer 14

Fasciculus gracilis

Question 15

an elevation produced at the upper part of fasciculus gracilis

Answer 15

Gracile tubercle

Question 16

on either side of fasciculus gracilis.

Answer 16

Fasciculus cuneatus

Question 17

an elevation produced at the upper part of fasciculus cuneatus

Answer 17

Cuneate tubercle

Question 18

marks the site of cuneate nucleus

Answer 18

Cuneate tubercle:

Question 19

marks the site of gracile nucleus

Answer 19

Gracile tubercle

Question 20

( Open medulla )4th ventricle on either side, an inverted V-shaped sulcus divides the area into 3 parts

Answer 20

Hypoglossal triangle
Vagal triangle
Vestibular area

Question 21

overlies hypoglossal nucleus

Answer 21

Hypoglossal triangle

Question 22

overlies dorsal vagal nucleus.

Answer 22

Vagal triangle

Question 23

overlies vestibular nuclei

Answer 23

Vestibular area

Question 24

Divides the pons into 2 halves

Answer 24

Basilar sulcus

Question 25

occupied by basilar artery

Answer 25

Basilar sulcus

Question 26

connect the pons to cerebellar hemisphere

Answer 26

Middle cerebellar peduncle

Question 27

Nerves emerging from pons (ventral surface)

Answer 27

Trigeminal (5th)
Abducent (6th)
Facial (7th)
Vestibulocochlear (8th)

Question 28

In dorsal surface of the pons On either side of median sulcus, it divides into 2 parts (from medial to lateral):

Answer 28

Medial eminence ( overlies abducent nucleus)
Vestibular area (overlies vestibular nuclei)

Question 29

On the ventral surface of the mid brain large column of descending fibers (crus cerebri) , on either side, separated by a depression called the

Answer 29

Interpeduncular fossa

Question 30

Nerves emerging from midbrain

Answer 30

Dorsal: Oculomotor (3rd) (from median aspect of crus cerebri)
Ventral: trochlear (4th) (caudal to inferior colliculus)

Question 31

The only cranial nerve emerging from dorsal surface of brain stem)

Answer 31

Trochlear (4th)