Flashcards in CN and Nuclei I and II Deck (50)
Which CN's don't have discrete nuclei in the brainstem?
CN's 1 and 2
General breakdown of where CN's are located in brainstem.
MDB: III and IV
PONS: V, VI, VII, and VIII
MED: ix, X,XI and XII
All sympathetic things done by the motor nucleus are done by...
CN X (Dorsal Motor X aka DMX)
Function of Edinger-Westphal nucleus
GVE for CN III, (pupil small and lens fat)
Function of Oculomotor nucleus
GSE for CN III
Function of Trochlear nucleus
GSE for CN IV
Function of motor nucleus
SVE for CN V (muscles of mastication etc.)
Function of Abducens nucleus
GSE for CN VI
Function of Superior salivatory nucleus
GVE for CN VII (lacrimal, sub-lingual and sub-maxillary)
Function of Facial nucleus
SVE for CN VII (muscles of face exp. etc.)
Function of Inferior salivatory nucleus
GVE for CN IX (parotid)
Function of Hypoglossal nucleus
GSE for CN XII (muscles of the tongue)
Function of Dorsal motor nucleus
GVE for CN X (to thorax and abdomen)
Function of Nucleus ambiguus
SVE for CN X (larynx) and IX (stylopharyngeus)
Function of Spinal accessory nucleus
SVE for CN XI (trapezius and SCM)
Function of Mesencephalic nucleus
GSA, jaw-jerk reflex for CN V
Function of Main sensory nucleus
GSA, for CN V (similar to dorsal column nuclei). Relays position, vibration and 2-point discrimination for THE HEAD.
i.e. position sense for the head.
Function of Cochlear/vestibular n.
SSA for CN VIII
Function of Spinal nucleus
GSA for V (similar to nucleus proprius) Relays pain and temp for head via spinal thalamic tract. Relays pain and temp for ear pinna for CN's VII, IX and X
Function of Nucleus of Solitary Tract
Only nucleus that has 2 components:
SVA (taste)- VII, IX and X
GVA for VII (palate-deep sensation), IX (palate and carotid sinus), and X (pain and stretch-viscera and aortic baroreceptors)
Basics of the CN I
Include attachment and nucleus of origin or termination.
Run through cribiform plate and enter olfactory bulb. Then synapse near hippocampus.
Attachment: Olfactory bulb
N-of-T: SVA-Olfactory mucosa
Attachment and nucleus of origin or termination for CN II
Att.: Optic chiasma
N-of-T: SSA- Lateral geniculate body
Where does the optic nerve ultimately synapse?
Occipital cortex (BROADMANN'S AREA 17 surrounding the calcarine fissure).
Fibers for vision course back in...
Attachment and nucleus of origin or termination for CN III
Att.: Sulcus on walls of interpeduncular fossa
(1) For GVE- Edinger-Westphal
(2) For GSE- Oculomotor nucleus
Attachment and nucleus of origin or termination for CN IV
Att.: Superior medullary velum
N-of-O: GSE-Trochlear nucleus
Special things with the trochlear nerve.
Has the longest intracranial exposure. Only nerve to cross and originate from dorsum of the brainstem.
Attachment and nucleus of origin or termination for CN V.
Att.: Lateral part of the pons
N-of-O and T:
(1) For GSA- Sensory nucleus of nerve V
(2) For SVE- Motor nucleus of nerve V
Attachment and nucleus of origin or termination for CN VI
Att.: Sulcus between pons and medulla on anterior surface
N-of-O:GSE- Abducens nucleus (pons)