Exam 2 General info. on brainstem nuclei Flashcards
Edinger Westphal nucleus- Parasympathetic control of ciliary & pupillary constrictor smooth muscles of the eye
C.N III
Accessory Oculomotor (Lower motor neuron)
Somatic motor muscle control for 4 of the 6 extraocular eye muscles & upper eyelid (levator palperbrae superioiris)
Oculomotor Nuclei (Lowe motor neuron) C.N III
Somatic motor muscle control for the superior oblique extraocular eye muscle. (moves eyeball)
Trochlear Nucleus (Lower motor neuron)
Proprioception from muscles of mastication & perhaps periodontial ligaments of the teeth
- Sensory function
- Nucleus of termination
- C. N. V
Trigeminal Mesencephalic Nucleus
Somatic motor to muscles of mastication. Also tensor villi palatini, tensor tympani, anterior belly of digastric & mylohyoid m.
Trigeminal Motor Nucleus
Somatic motor muscle control for the lateral Rectus extraocular eye muscle. C.N. VI
Abducens Nucleus
Most superficial somatic motor muscles of the scalp & face (muscles of facial expression). Include the posterior belly of the digastric m. & the platysma m.
Facial Nucleus
Parasympathetic control of lacrimal (tear) glands, submandibular & sublingual salivary glands.
Superior Salivatory Nucleus
Parasympathetic control of parotid salivary gland.
Inferior Salivatory Nucleus
Equilibrium & hearing, respectively. These nuclei are complex & subdivided into parts.
Vestibular & cochlear nuclei
Nucleus of termination
Sensory function
C.N VIII on each side
Somatic motor muscle control for 16 of 18 named tongue muscles.
LMN
Nucleus of origin
Hypoglossal Nucleus
Sensory & motor (parasympathetic) of organs supplied such as voice, heart, lung, & intestines in C.N X
Dorsal Nucleus of Vagus
Nerves IX, X, XI all share this nucleus in delivery of visceral efferent (motor) fibers to the pharynx musculature
Nucleus ambiguus
Sensory reception via the VII, IX, X C.N primarily dealing with taste from the tongue, palate & pharynx
- Nucleus of termination
- Preganglionic parasympathic neurons
Nucleus Solitarius
AKA: Nucleus of the spinal trigeminal tract.
The main sensory reception nucleus for the face dealing with pain, thermal, discrimative tactile & proprioception. The caudal section extends down to the C3-4 cord levels.
C.N VII, IX, X also contribute here.
Spinal trigeminal nucleus
Nucleus of termination
Somatic motor nucleus for movement of the important neck/ head muscles called the sternocleidomastoids & trapezius. Most fibers originate in the upper 5 cervical cord levels & lower M.O.
Spinal Accessory nucleus
Where cranial nerve appears to be attached to the surface of the CNS (e.g The trigeminal nerves’ _______ origin is out of the side of the pons )
Apparent Origin
The nucleus or nuclei that contribute motor fibers to the cranial nerve(s). These are located inside the CNS (e.g. the hypoglossal nucleus for CN XII is located inside the M.O.
Nucleus of origin
Nucleus or nuclei that receive incoming AFFERENT input from the cranial nerve(s). These are also located inside the CNS (e.g. the solitary nucleus of the M.O. which serves as a taste reception center for C.N.’s VII, IX, & X
Nucleus of termination
