Contralateral or ipsilateral?

Question 1

MLF

Answer 1

Ascending is contralateral- carries info from III to IV

Descending carries info from vestibular nuclei (pontomedullary junction) to head and neck and trunk balance muscles ipsilaterally?

Question 2

Corticobulbar tract

Answer 2

mostly bilateral except….

XI (accessory nu.): ipsilateral for SCM and contralateral for trapezius;
XII (hypoglossal nu.): crossed fro genioglossus;
VII (facial nu.): bilateral for upper face, contralateral for lower face

Question 3

trochlear nerve

Answer 3

decussates prior to leaving the brainstem, so supplies the contralateral superior oblique

Question 4

vestibular nuclei

Answer 4

There are 4 vestibular nuclei (lateral, inf, sup med). Medial does reflex adjustment of the head and neck (ipsilateral) and lateral maintains posture (ipsilateral)

Question 5

motor input to trapezius and SCM

Answer 5

UMN (corticobulbar) is contrlateral to trap and ipsilateral to SCM
LMN is ipsilateral

Question 6

Motor input to intrinsic and extrinsic tongue muscles

Answer 6

Intrinsic tongue muscles change the shape of the tongue (vs. extrinsic are attached to bone and change the position of the tongue)

UMN (corticobulbar) to intrinsic muscle LMNs is bilateral, contralateral to extrinsic LMN .

LMN from hypoglossal nucleus to genioglossus is ipsilateral

Therefore: UMN lesion tongue will point away from side of lesion
LMN lesion tongue will point towards side of lesion.

Question 7

Taste fibers

Answer 7

ipsilateral

pathway: tongue–> solitary tract–> solitary nucleus–> VPN of thalamus–> primary somatosensory cortex–> insula

Question 8

pain and temp from face

Answer 8

spinal trigeminal nucleus..

Question 9

Would you see emotional learning deficits with unilateral amygdala damage?

Answer 9

No- need bilateral damage

Question 10

Information from cochlea

Answer 10

bilateral representation on cortex

Question 11

Motor hand area –>hand movement

Answer 11

contralateral

Question 12

Stroke to left subthalamic nucleus will result in….

Answer 12

CL hemiballism

Question 13

connection between vestibulocerebellum and vestibular nuclei, reticular formation

Answer 13

bilateral

Question 14

Connection between cortex and cerebrocerebellar

Answer 14

CL through middle peduncle then crosses again to get back to cortex

Question 15

Parasympathetics from EDW nucleus

Answer 15

ipsilateral