Cranial Nerves, Branchial Arches, Pharyngeal Pouches Flashcards
preotic somites
form extrinsic eye muscles
CN III,IV,VI
epaxial dorsal mesoderm
extensors of head, neck, and back
hypoxia dorsal mesoderm
flexors of back, diaphragm, hypobranchial, tongue
somatic lateral place mesoderm
appendicular muscles (limbs)
visceral splanchnic lateral plate mesoderm
heart, blood vessels
branchial splanchnic lateral plate mesoderm
CN V,VII,IX,X,XI
muscles of mastication, facial expression, pharynx, larynx
Nerve V
trigeminal
sensory: head and mouth, tongue (not taste), temperature, pressure, pain
motor: signals to mastication and ear
Nerve VII
facial
sensory: taste from anterior 2/3 of tongue, proprioception from facial muscles
motor: contraction of muscles of facial expression
Nerve IX
glossopharyngeal
sensory: taste on posterior 1/3 of tongue, monitoring of blood pressure pCO2 and pO2 to medulla
motor: contraction of muscles for swallowing and salivary secretion
Nerve X
vagus
sensory: cardiac monitoring to medulla, monitoring of blood pressure pCO2 and pO2 to medulla
motor: contraction of muscles for swallowing, coughing, and speech, inhibits cardiac rate, stimulates GI function, movement, and secretion
Nerve XII
hypoglossal
motor: contraction of tongue for swallowing, speaking and general movement
What is the heritability pattern for Duchenne Muscular Dystrophy?
recessive gene on short arm of X chromosome
Who is most likely to be affected by Duchenne Muscular Dystrophy?
men bc it is recessive X linked (only need one copy)
What are the results of Duchenne Muscular Dystrophy?
fragile sarcolemma membrane, abnormal leaking of calcium to muscle, inflammation and immune system destruction of muscle fibers
1st Branchial Arch
Nerve V
Aortic Arch I
bones: malleus, incus
muscles: muscles of mastication (master, temporals, pterygoids
