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Cranial Nerves Pathways

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medicoblasto's version from 2016-06-26 20:07

Functional Classification

Question Answer
GSAgeneral sensory information from skin, deep tissues of head, and dura mater.
GVAgeneral visceral information from the parasympathetic components of VII, IX, and X.
GVEgeneral visceral efferents (motor component) from the parasympathetic portions of III, VII, IX, and X.
GSEgeneral motor innervation of skeletal muscles (including eye muscles, etc).
SVEsimilar to GSE, except that they innervate skeletal muscles of branchiomeric origin.
SSAspecial senses afferents, specifically hearing/vision.
SVAspecial sense afferents, specifically taste/olfaction.
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Eye muscles and innervation

ADEBCFGHI

 

LabelAnswer
AOculomotor nucleus
BTrochlear nucleus
CAbducens nucleus
DSuperior Oblique (CN IV)
ESuperior Rectus (CN III)
FLateral Rectus (CN VI)
GMedial Rectus (CN III)
HInferior Rectus (CN III)
IInferior Oblique (CN III)
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CN IV

ACBDEFGIHJ

 

LabelAnswer
APeriaqueductal gray
BTrochlear nucleus
CTrochlear nerve
DSuperior cerebellar penducle
ESubstancia nigra
FCrus cerebri
GSuperior oblique
HLateral rectus
ISuperior rectus
JMedial rectus
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CN V

HGADBICJFE

 

LabelAnswer
AMesencephalic nucleus
BMain sensory nucleus
CSpinal nucleus
DTrigeminal ganglion
EMandibular nerve
FMaxillary nerve
GOphtalmic nerve
HOphtalmic division
IMaxillary division
JMandibular division
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Trigeminal Nuclei Location

Question Answer
Mesencephalic nucleusStarts in midbrain, extends into the pons. Stops where main sensory nucleus begins.
Main Sensory nucleusStarts in pons and becomes continuous with the spinal nucleus in the medulla.
Spinal nucleusExtends inferiorly into the spinal cord as far as C2.
Motor nucleusLocalized to pons, medial to main sensory nucleus (masseter, temporalis, tensor tympani).
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Trigeminal Nuclei Function

Question Answer
Mesencephalic nucleusPropioception from the jaw, mechanoreceptors from the teeth.
Main Sensory nucleusTouch/position sensation from face (sorta like dorsal column info).
Spinal nucleusPain/temperature from the face
Motor nucleusLocalized to pons, medial to main sensory nucleus (masseter, temporalis, tensor tympani).
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CN XII

ABCIDHEFG

 

LabelAnswer
AHypoglossal Pathway
BCorticobulbar tract
CHypoglossal nucleus
DInferior cerebellar penducle
EInferior Olivary nucleus
FPyramid
GHypoglossal nerve (CN XII)
HGeniohyoid muscle
IGeniglossus muscle
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