Anatomy 8

Question 1

The cerebellum is the main center for contralateral muscle coordination and body equilibrium ?

Answer 1

F

Ipsilateral

Question 2

The cerebellum receives continuous information from ?

Answer 2

Motor&raquo_space;> motor cortex

Proprioceptive information (sense of
position and movement of body parts in space) >>> the skeletal muscles, tendons, and joints.

equilibrium&raquo_space;> the inner ear through CN #8

Question 3

The cerebellum compares the information received from the motor cortex with information received from the sensory receptors if detect any error in muscular activity, it can correct this error through indirect pathways to the lower motor neurons in the spinal cord ……thus it maintains ?

Answer 3

muscle coordination and body equilibrium.

Question 4

Where is gross anatomy of cerebellum .

Answer 4

It is situated in the posterior cranial fossa, beneath the tentorium cerebelli and behind the pons and medulla

Question 5

What is separated cerebellum from pons & medulla?

Answer 5

fourth ventricle

Question 6

Cerebellum connected to brain stem by ?

Answer 6

Superior cerebellar peduncles : mid brain

Middle cerebellar peduncles : pons

Inferior cerebellar peduncles : medulla oblongata

Question 7

Cerebellum Makes Only 10 % total volume of the brain but

more than half of all its neurons.

Answer 7

T

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Question 8

External Surface of Cerebellum

Answer 8

It is formed of two cerebellar hemispheres joined by a median narrow part; the vermis.
• Cerebellar surface is divided by numerous curve transverse fissures giving it a laminated appearance.
• A deep fissure; the horizontal fissure, lies along the margin of the cerebellum and separates the superior from the inferior surface.

Question 9

Internal Structure of Cerebellum

Answer 9

Outer gray matter called cerebellar cortex, extensively folded forming folia.
• Inner white matter showing distinctive treelike
pattern called Arbor vitae (In latin “tree of life”)&raquo_space;>
It brings sensory and motor sensation to and from cerebellum

Question 10

4 pairs of nuclei within white ma 4 pairs of nuclei within white m

Answer 10

4 Nuclei on each side, from medial to lateral

Fastigial Nuclei
Globose Nucleus
Emboliform Nucleus
Dentate Nucleus

Question 11

Constitute the primary source of efferent fibers from the cerebellum to the other part of the brain.

Answer 11

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Question 12

Anatomical Lobes of Cerebellum

Answer 12

The cerebellum is divided into three main lobes: the anterior lobe, the middle lobe and the flocculonodular lobe

Question 13

The anterior lobe

Answer 13

The anterior lobe can be seen on the superior surface. It is separated from the posterior lobe by a wide V- shaped fissure called the primary fissure

Question 14

The posterior (middle) lobe

Answer 14

The posterior (middle) lobe, which is the largest part of the cerebellum, is situated between the primary and posterolateral fissure.

Question 15

The flocculonodular lobe

Answer 15

The flocculonodular lobe is situated posterior to the posterolateral fissure.

Question 16

Which is separated between lobes ?

Posterior lobe between tow fissure ?

Answer 16

Anterior from posterior&raquo_space;> primary fissure

Posterior lobe situated between the primary and posterolateral fissure.

Posterior from flocculonodular&raquo_space;> posterolateral fissure.