REXED LAMINA

Question 1

posterior horn

mediates pain, temperature and touch

Answer 1

lamina 1

Question 2

posterior horn

contains large concentration of substance P and opiate receptors

Answer 2

lamina 2

Question 3

posterior horn

receives inputs from IV, V, VI
mediates pain temp, touch and propioception
this one is the thickest of the 1st four lamina

Answer 3

lamina 3 and 4

Question 4

posterior horn

composed of neurons with dendrites in lamina II
receives inputs from lamina AB, Adelta, and C neurons
contributes to ipsilateral and contralateral STT

Answer 4

lamina V

Question 5

posterior horn

source of ipsilateral and spinocerebellar pathways

Answer 5

lamina VI

Question 6

posterior horn

receives muscle and tendon afferents to give rise to spino-cerebellar tracts from the thoracic nucleus

viscerosensory cell populations from intermediomedial nucleus

Answer 6

lamina VII

Question 7

anterior horn

contains preganglion neurons from the sympathetic system and parasympathetic preganglionic neurons

Answer 7

lamina VII

Question 8

anterior horn

receives input from descending corticospinal, rubrospinal, vestibulospinal, and reticulospinal pathways

Answer 8

lamina VIII

Question 9

anterior horn

trunk flexors and extensors
arm/thigh flexor extensors
forearm/leg flexors and extensors
hand/foot flexors and extensors
motor output to diaphragm and trapezius and SCM

Answer 9

lamina IX

Question 10

the parasympathetic and sympathetic nervous system have what kinds of innervation?

Answer 10

visceral motor

Question 11

where is the PNS located and what are the cranial and spinal nerves?

function

Answer 11

crania-sacral

cranial - 3,7,9,10
spinal - 2,3,4

homeostasis

Question 12

where is the SNS located and what are the cranial and spinal nerves?

function

Answer 12

thoracolumbar

thoracic spinal nerves 1-12
lumbar spinal nerves 1,2,3

stress, fight or flight and primarily innervates vascular smooth muscle

Question 13

what are the important features of autonomic neurons?

Answer 13

preganglionic neurons are myelinated

postganglionic neurons are non myelinated

the PNS has one type of ganglia

the sympathetic NS has tow types of ganglia

Question 14

describe the fibers of the autonomic neurons?

Answer 14

preganglionic PNS are long
postganglionic PNS is short

preganglionic sympathetics are short and post ganglionic are long