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FA-2016 neuro pg 452

firstaid neuro page 452( based of FA 2016)

QuestionAnswer
what is syringomyelia? cystic cavity within the spinal cord (if central canal>> hydromyelia)
which fibers of spinal cord are damaged in syringomyelia? anterior spinal commisural fiber
syringomyelia is associated with what? Arnold chiari malformation type II
what is Arnold chiary malformation type I? >3-5mm cerebellar tonsilar ectopia/ Manifests and headache and cerebellar symptoms
where does syringomyelia most commonly occur? C8-T1
Clinical feature of syringomyelia? Cape like - bilateral loss of pain and temperature sensation in upper extremities(fine touch sensation is preserved)
syringomyelia may cause what syndrome? horner syndrome (Ptosis, anhydrosis, miosis)
which embryonic structure forms tongue? 1st and 2nd branchial arches form anterior 2/3rd of tongue / 3rd and 4th branchial arches form posterior 1/3rd of tongue
sensation of tongue? General sensation (9) and taste sensation (9) - post 1/3rd (99) General sensation (5) and taste sensation (7) - anterior 1/3rd (57)
taste sensation is carried via ? CN 7(anterior 2/3rd) ,9(posterior 1/3rd) , 10- extremely posterior (solitary nucleus)
pain sensation in tongue is carried via? CN V3 - anterior (53), 9 -posterior, 10 - extremely posterior
motor innervation in tongue? CN 10, 12
muscle of tongue is derived from? occipital myotomes(somatomeres)
Motor innervation to tongue specifically? Motor innervation is via CN 12 to hypoglossus, genioglossus, styloglossus Motor innervation is via CN 10 to palatoglossus
function of hypoglossus? retract and depresses the tongue
function of genioglossus? protrude the tongue
function of styloglossus? draws side of tongue upward to create trough for swalloing
function of palatoglossus? elevate posterior tongue during swallowing
Created by: nepal.sarthak1