Nervous System

Question 1

Spinal cord T1 to T5 SNS mainly innervate

Answer 1

cranial, cervical and thoracic viscera

Question 2

SNS from T1 to T5

Answer 2

travels upwards

Question 3

SNS from T5-L2

Answer 3

travels downwards

Question 4

White rami communicantes only at which level?

Answer 4

T1 to L2

Question 5

Preganglionic fibres from T5 to L2 form?

Answer 5

splanchic nerves - greater, lesser, least, lumbar and sacral

Question 6

SNS and PNS from which spinal cord level?

Answer 6

SNS - T1 to L2

PNS - cranial - III, VII, IX and X and sacral S2 to S4

Question 7

Cranial nerves for PNS

Answer 7

III - ciliary ganglion - pupillary constriction
VII - pterygopalatine ganglion - lacrimation AND submandibular ganglion - salivation
IX - otic ganglion - parotid salivation
X - thoracic visceral plexus and most abdo viscera

Question 8

PNS S2 to S4 function

Answer 8

sacral parasympathetic fibres innervating inferior abdo viscera, pelvic viscera (pelvic splanchnic nerves) and arteries associated with erectile tissues of perineum

Question 9

Visceral plexus

Answer 9

Cardiac, oesophageal and thoracic aorta plexus in thorax
Large prevertebral plexus in abdomen anterior to aorta extending inferiorly to lateral walls of pelvis. Receives input and output from all abdo and pelvic viscera (greater, lesser, least, lumbar and sacral for SNS + pelvic splanchnic for PNS)

Question 10

Cervical plexus

Answer 10

anterior rami C1 o C4

Question 11

Brachial plexus

Answer 11

anterior rami C5 to T1

Question 12

Lumbar plexus

Answer 12

anterior rami L2 to L4

Question 13

Sacral plexus

Answer 13

anterior rami L4 to S4

Question 14

Somatic plexus

Answer 14

cervical, brachial, lumbar and sacral