Medulla

Question 1

Medulla connects

Answer 1

Pons and spinal cord

Question 2

The junction of the medulla and spinal cord is located

Answer 2

At the foramen magnum. Where posterior and anterior roots of the first cervical spinal nerve originates

Question 3

The central cavity of the spinal cord expands in the medulla as

Answer 3

Cavity of the 4th ventricle

Question 4

Depression on Anterior surface of medulla

Answer 4

Anterior median fissure

Question 5

On each side of anterior median fissure

Answer 5

Pyramids

Question 6

What are the pyramids made of?

Answer 6

Bundles of nerve fibers, corticospinal fibers originating from precentral gyrus of cortex

Question 7

The bundle fibers in pyramid taper inferiorly and cross over to form

Answer 7

Decussation pf pyramids

Question 8

Emrgimg from the anywrior median fissure above the decissation

Answer 8

External arcuate fibers

Question 9

Posteolateral to the pyramids

Answer 9

Olives produced by inferior olivary nuclei

Question 10

Posterior to olives

Answer 10

Inferior cerebellar peduncles

Question 11

Cranial nerve in the groove between olive and inferior cerebellar peduncles

Answer 11

Glossopharyngeal
Vagus
Accessory nerve

GAV

Question 12

Posterior surface of superior half of the medulla oblongata forms

Answer 12

Floor of 4th ventricle

Question 13

Posterior surface of inferior half of the medulla is continous with

Answer 13

Posterior aspect of spinal cord

Question 14

Depression on posterior part of medulla

Answer 14

Posterior median sulcus

Question 15

On each side of median sulcus

Answer 15

Gracile tubercle

Cuneate tubercle

Question 16

This structure cause extensive lateral spread of white and grey matter

Answer 16

Fourth ventricle

Question 17

Internal structure of medulla considered at

Answer 17

Level of decussation of pyramids
Level of decussation of lemnisci
Level of olives
Level inferior to pons

Question 18

Corticospinal tract descends into whit matter in spinal cord as

Answer 18

Lateral corticospinal tract

Question 19

Decussation of lemnisci

Answer 19

The great sensory decussation

Question 20

Where is decussation of lemnisci located

Answer 20

Anterior to central grey matter and posterior to the pyramids

Question 21

The lemnisci are formed from

Answer 21

Internal arcuate fibres emerging from nucleus gracialis and cuneatus