Neuroanatomy 4

Question 1

what are the columns of white mater of the spinal cord

Answer 1

posterior lataerl and anteiro

Question 2

what are the mian tracts that are asceinding

Answer 2

lateral spinothalmic
dorsal column

Question 3

what are the main tracts are descending

Answer 3

corticospinal

Question 4

role of corticospinal tracgt

Answer 4

carries motor impulses from motor cortex to skeletal muscles

Question 5

role of posterior dorsal column

Answer 5

carries tough, tactile localsistaion, vibration sense, proprioception

Question 6

role of latearl spinothalmic tract

Answer 6

carries pain and temperature

Question 7

where does the cortical spianl pathway start

Answer 7

motor cortex area 4

Question 8

what is the pathway of te corticospinal tract

Answer 8

motor area 4 to internal capsule, , to contralalater crainl nucoe, and cross over at the decussation of pyrmaids

Question 9

what are the names of the nruosnn in the corticospianl pathway

Answer 9

upper and lower motor neurons

Question 10

where do the upper and lower motor neurons spilt

Answer 10

oppostie side of the medula

Question 11

which part of the spinal cord is the first neruon part of

Answer 11

grey mater

Question 12

which part of te spinal cord is the corticospia tract pruon part of

Answer 12

white maer part mater of ventrla horn

Question 13

what is the posterio dorasla colun route of first neuron

Answer 13

1st neuron ges in to doral route ganigl then up then synapse in the nucleus gracilis of the medulla oblongata.

Question 14

route of sencond neruon

Answer 14

it crosses the medulla, then goes up though medual, pons and midbrain to thalamus

Question 15

name of tract of seccond dnruon of poster column

Answer 15

medial lemincus

Question 16

route of 3rd neruoon

Answer 16

thalamus, though internal capsulre and go tot he post centla gyrus

Question 17

route of lateral spinothalmic tract 1st neruon

Answer 17

1st neruon enteros grey mater and ends at the same level

Question 18

route of 2nd neruon of lateal spinothalic tract

Answer 18

it cosses over a the spoa cord gery mater to reach lataterl column and becomes lateral spinothalicm tract, it ends at the thalamus

Question 19

route of 3rd order neuons

Answer 19

goes to interal calpuse, and goes to post centla gyrus

Question 20

what is speical about laterla spinothalic tract compared to doral column and corialpay tract

Answer 20

it crosses over at same level it enters

Question 21

what happesn int eh strech repsons reloex

Answer 21

due to tendon being steched it goes stiang thatough spial core and a motor synape coemsout of the same to contact muce extending limb and relax opposite mucle

Question 22

what is te flexor reflex

Answer 22

wher when lose balace in one area, it helps to mainly balce in other limb though passing inforat though great matera at same level

Question 23

what happesn to reflex if ther is a super motor neruon lesion

Answer 23

the refles are exaggeration

Question 24

differnece betwen upper and ower motor neuron lesion effect on tone

Answer 24

upper cuases increaed tone
lower cuaes reduced tone