N.S physo

Question 1

whats the origin of head and neck

Answer 1

LHC 1&2 throacic segments spinal cord

Question 2

what the relay station of head and neck

Answer 2

superior cervical ganglia (SCG)

Question 3

what are the five-faction done to the eye by sympathetic ns

Answer 3

• muller ms contraction = exophthalmos
  -ciliary ms relaxation= help eye see far vision
  -dilator pupillae ms = pupillary dilatation mydriasis
  -tarsal ms = widening of the palpebral fissure by elevating the upper eye lid + lowering of lower lid
• V.C of lacrimal blood vessels = decrease tears trophic secretion

Question 4

what are the 3 factions done by the sympathetic to the salivary glands

Answer 4

• V.C
• contraction of myoepithelial cells surrounding the acini = squeezing of acini
  -trophic secretion (little, vicious poor in water, rich in enzyme)

Question 5

what are the 3 factions done by the sympathetic to the skin

Answer 5

-Contraction of piloerector
muscle → hair erection
-Stimulation of sweat
glands → sweat secretion
V.C

Question 6

WHAT ARE THE FUCTION BY SYMATHETIC DONE TO THE CEREBRAL BLOOD FLOW

Answer 6

mild V.C

Question 7

Horner’s syndrome
Def ?

Answer 7

Group of signs which results from interruption of sympathetic to head and
neck.

Question 8

what are the causes of horner syndrome

Answer 8

Causes:
a) Lesion in Tl and T2 segments.
b) Lesion in Superior cervical ganglion.

Question 9

signs of horner syndrome

Answer 9

1)Ptosis :
Dropping of upper eye lids due to paralysis of superior tarsal muscles.
2)Miosis :
Constriction of pupils due to paralysis of dilator pupillae muscle.
3)Anhydrosis :
Absence of sweat secretion → dryness of affected side of face.
4)Enophthalmos :
Sinking of eye ball due to paralysis of Muller’s muscles.
5)Vasodilatation :
of skin blood vessels, due to loss of sympathetic vasoconstrictor tone
so skin becomes Red & Warm

Question 10

sympathetic Nervous System
Thorax :
Origin :
Lateral horn cells of T1 → T5

Question 10

sympathetic Nervous System
Thorax :
Origin :
Lateral horn cells of T1 → T5

Question 10

sympathetic Nervous System
Thorax :
Origin :
Lateral horn cells of T1 → T5

Question 11

sympathetic Nervous System

Origin Thorax

Answer 11

Lateral horn cells of T1 → T5

Question 12

sympathetic Nervous System
Thorax relay station

Answer 12

All Cervical & upper 4 thoracic lateral Ganglia

Question 13

sympathetic Nervous System
Thorax faction to the heart

Answer 13

-Increase all cardiac
properties :
1) Rhythmicity
2) Excitability
3) Conductivity
4) Contractility

-Coronary Blood Flow :
1) Direct : V.C
2) Indirect : Vaso-dilatation
(V.D)
Metabolic ( accumulation of
metabolites )
Stronger

Question 14

sympathetic Nervous System
Thorax to the lungs

Answer 14

-Inhibition of bronchial
muscles → Bronchodilatation
-Inhibition of bronchial mucus
glands → ↓ mucus secretion

Question 15

sympathetic Nervous System
abdomen ganglia

Question 16

sympathetic Nervous System
abdomen origin

Question 17

sympathetic Nervous System
abdomen liver

Question 18

sympathetic Nervous System
abdomen pancreases

Question 19

sympathetic Nervous System
abdomen stomch

Question 20

sympathetic Nervous System
abdomen gal bladder