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L5, Sympathetic to head and neck, physiology

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1.Relay of Sympathetic supply to head & neck: 

a- inferior cervical ganglion.

b-middle cervical ganglion.

c-superior mesenteric ganglion.

d- superior cervical ganglion.

2. Sympathetic supply to head & neck originates from:

a- L.H.C of upper two cervical vertebrae.

b- A.H.C of upper two cervical vertebrae 

c- L.H.C of upper two thoracic vertebrae.

d- A.H.C of T5 and T6.

3.Postganglionic neurons arise from superior cervical ganglion supply the following structure except:

a-eyes.

b-Skin of the head & neck. 

c-heart.

d-Salivary glands.

4.Horner's syndrome is characterized by:
 
a-Miosis.

b-Elevation of the upper eye lid.

C-Forward protrusion of the eyeball.

d-Increased sweating of the side of lesion.

5.Sympathetic stimulation to eyes causes all of the following except:

a-lowering the upper eye lid.

b-Mydriasis.

c-Exophthalmos.

d-Relaxation of ciliary muscle.

6.Elevation of the upper eye lid due to contraction of:

a-levator scapulae muscle.

b-levator palpabral muscle. 

c-dilator pupillae muscle.

d-Muller ′s muscle.


7.Sympathetic stimulation to skin of the head & neck causes all of the following except:

a-Hair erection.

b-Vasoconstriction of skin blood vessels. 

c-Sweat secretion.

d-Vasodilation of skin blood vessels.

8.Horner’s syndrome is:

a-An injury to the cervical sympathetic nerve fibers produce a syndrome (a group of symptoms) on both sides.
 
b-An injury to the cervical sympathetic nerve fibers produce a syndrome (a group of symptoms) on the same affected side.

c-An injury to the cervical sympathetic nerve fibers produce a syndrome (a group of symptoms) on different sides.

d-An injury to the thoracic sympathetic nerve fibers produce a syndrome (a group of symptoms) on the same affected side.

9.Sympathetic stimulation to Salivary glands causes:

a-Trophic secretion.

b-vasodilation of salivary glands blood vessels.

c-watery secretion.

d- hair erection.

Answers:

1-d
2-a
3-c
4-a
5-a
6-b
7-d
8-b
9-a


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