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15 Cards in this Set
- Front
- Back
Oculomotor Nuclear Complex
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-midbrain (by superior colliculus)
-Motor nucleus to superior, medial, and inferior rectus and inferior oblique muscles |
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Edinger-Westphal nucleus
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-dorsal to oculomotor complex
-preganglionic parasympathetic to constrictor pupillae |
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Trochlear nucleus
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-beneath inferior colliculus (midbrain)
-motor to superior oblique -after exiting brainstem, fibers decussate |
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Mesencephalic Nucleus of V
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-midbrain and pons
-sensory (muscle sense info from muscle spindles), contains ganglion cells -project to motor nucleus of V and spinal nucleus of V (analogous to Clarke's Column) |
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Motor Nucleus of V
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-pons
-motor to muscles of mastication via mandibular division of V. -medial to chief sensory nucleus of V |
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Chief Sensory Nucleus of V
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-pons
-sensory for fine touch and pressure of face (analogous to dorsal column nuclei) -projects to contralateral VPM nucleus of thalamus |
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Nucleus of Spinal Tract of V
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-pons, medulla
-continuous with dorsal horn -receives pain and temperature afferents from face -projects to contralateral VPM nucleus of thalamus -analogous to lissauer's tract, substantia gelatinosa, nucleus proprius of s.c. |
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Abducens Nucleus
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-pons
-motor nucleus for lateral rectus muscle -nestled in genu of facial nerve |
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Facial Nucleus
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-pons
-motor to muscles of facial expression -fibers loop around the abducens nucleus before exiting the brainstem |
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Vestibular Nuclei
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-pons
-complex of 4 nuclei in lateral floor of 4th ventricle -descending fibers to medial and lateral vestibulospinal tract -ascending fibers to medial longitudinal fasciculus (MLF) to ocular nuclei, thalamus, and cerebellum |
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Cochlear Nuclei
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-pons
-auditory input from CN VII -output to superior olivary nucleus via trapezoid body |
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Nucleus of Tractus Solitarius
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-medulla
-taste from VII, IX, X -visceral autonomic afferents from IX and X -output to dorsal motor nucleus of X, taste to thalamus, reticular formation |
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Dorsal Motor Nucleus of X
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-medulla
-preganglionic parasympathetic motor mucleus. innervates major body organs. -located dorsolateral to hypoglossal nucleus |
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Nucleus Ambiguus (Ventral Motor Nucleus of X)
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-medulla
-branchiomotor fibers from IX and X to larynx, pharynx, and soft palate |
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Hypoglossal Nucleus
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-medulla
-motor to tongue muscles |