Neuroanatomy 4 Flashcards
what are the columns of white mater of the spinal cord
posterior lataerl and anteiro
what are the mian tracts that are asceinding
lateral spinothalmic
dorsal column
what are the main tracts are descending
corticospinal
role of corticospinal tracgt
carries motor impulses from motor cortex to skeletal muscles
role of posterior dorsal column
carries tough, tactile localsistaion, vibration sense, proprioception
role of latearl spinothalmic tract
carries pain and temperature
where does the cortical spianl pathway start
motor cortex area 4
what is the pathway of te corticospinal tract
motor area 4 to internal capsule, , to contralalater crainl nucoe, and cross over at the decussation of pyrmaids
what are the names of the nruosnn in the corticospianl pathway
upper and lower motor neurons
where do the upper and lower motor neurons spilt
oppostie side of the medula
which part of the spinal cord is the first neruon part of
grey mater
which part of te spinal cord is the corticospia tract pruon part of
white maer part mater of ventrla horn
what is the posterio dorasla colun route of first neuron
1st neuron ges in to doral route ganigl then up then synapse in the nucleus gracilis of the medulla oblongata.
route of sencond neruon
it crosses the medulla, then goes up though medual, pons and midbrain to thalamus
name of tract of seccond dnruon of poster column
medial lemincus
route of 3rd neruoon
thalamus, though internal capsulre and go tot he post centla gyrus
route of lateral spinothalmic tract 1st neruon
1st neruon enteros grey mater and ends at the same level
route of 2nd neruon of lateal spinothalic tract
it cosses over a the spoa cord gery mater to reach lataterl column and becomes lateral spinothalicm tract, it ends at the thalamus
route of 3rd order neuons
goes to interal calpuse, and goes to post centla gyrus
what is speical about laterla spinothalic tract compared to doral column and corialpay tract
it crosses over at same level it enters
what happesn int eh strech repsons reloex
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
what is te flexor reflex
wher when lose balace in one area, it helps to mainly balce in other limb though passing inforat though great matera at same level
what happesn to reflex if ther is a super motor neruon lesion
the refles are exaggeration
differnece betwen upper and ower motor neuron lesion effect on tone
upper cuases increaed tone
lower cuaes reduced tone
