2. CNs and Autonomics Flashcards
All sympathetic fibers are (1) ___ arising from the (2) ____.
- post-ganglionic
- superior cervical ganglion of sympathetic trunk
How do the sympathetic fibers travel?
on vessels to structures they innervate
What is the only nerve that is post-ganglionic sympathetic?
deep petrosal nerve
Where do pre-ganglionic parasympathetic fibers arise?
nuclei in the brain stem
Where do pre-ganglionic parasympathetic fibers synapse?
4 ganglia in the head = ciliary, pterygopalatine, otic, and submandibular
How are pre-ganglionic parasympathetics carried?
CN III, VII, IX, X
All post-ganglionic fibers“piggy back” on branch of the _____ n. to arrive at the structure that they innervate.
trigeminal n.
Primary function of CN: olfactory
(sensory, somatic, and/or parasympathetic)
sensory: olfaction
Primary function of CN: optic
(sensory, somatic, and/or parasympathetic)
sensory: vision
Function of trochlear n.
somatic: superior oblique eye m.
Divisions of the trigeminal n.
- V1: ophthalmic n.
- V2: maxillary n.
- V3: mandibular n.
Primary function of CN: vestibulocochlear
(sensory, somatic, and/or parasympathetic)
sensory: hearing (cochlear); equilibrium (vestibular)
Primary function of CN: glossopharyngeal
(sensory, somatic, and/or parasympathetic)
- sensory: touch/taste to posterior 1/3 of tongue, visceral sensory to carotid bodies
- somatic: 1 pharyngeal muscle (stylopharyngeus m.)
- parasympathetic: parotid salivary gland
Primary function of CN: accessory
(sensory, somatic, and/or parasympathetic)
somatic: trapezius m. and SCM m.
Somatic function of the oculomotor n.
- 4 eye muscles:
- superior rectus m.
- medial rectus m.
- inferior rectus m.
- inferior oblique m.
- levator palpebrae superioris m.
Parasympathetic function of the oculomotor nerve
- sphincter pupillae m. constricts pupil
- ciliary m. contracts to make lens puffy for near vision
Branchial motor of the facial n.
- muscles of facial expression
- stapedius m.
- stylohyoid m.
- posterior belly of the digastric m.
Visceral motor of the facial n.
- salivary glands
- lacrimal glands
- glands of the nose and the palate
General sensory of the facial n.
- skin of external auditory meatus
Special sensory of the facial n.
- anterior 2/3 of the tongue
Branchial motor of the glossopharyngeal n.
stylopharangeus m.
Visceral motor of the glossopharyngeal n.
parasympathetic innervation of the parotid gland
Visceral sensory of the glossopharyngeal n.
visceral sensory from the carotid body and sinus
General sensory of the glossopharyngeal n.
- external ear
- posterior 1/3 of tongue
- internal surface of TM
- palatine tonsil
- pharynx
Special sensory of the glossopharyngeal n.
posterior 1/3 of tongue
Branchial motor of the vagus n.
- superior, middle, and inferior pharyngeal constrictor mm.
- cricothyroid m.
- posterior cricoarytenoid m.
- lateral cricoarytenoid m.
- aryepiglottic m.
- thyroarytenoid m.
- transverse arytenoid m.
- oblique arytenoid m.
- vocalis m.
- levator veli palatini m.
- palatoglossum m.
- salpingopharyngeus m.
- palatopharyngeus m.
- musculus uvulae m.
Visceral motor of the vagus n.
- pharynx
- larunx
- trachea
- bronchi
- heart
- esophagus
- stomach
- intestine
Visceral sensory of the vagus n.
- base of tongue
- pharynx
- larynx
- trachea
- bronchi
- heart
- esophagus
- intestine
- stomach
General sensory of the vagus n.
- auricle
- external auditory meatus
- dura mater of the posterior cranial fossa
- pharynx
- soft palate
- larynx
Somatic motor of the hypoglossal n.
- genioglossus m.
- styloglossus m.
- hypoglossus m.
- superior longitudinal m.
- inferior longituginal m.
- transverse m.
- vertical m.
Sensory function of the ophthalmic division of the trigeminal n.
- scalp
- forehead
- cornea
- dorsum of nose
- mucosa of nasal cavity
- paranasal sinuses
Sensory function of the maxillary division of the trigeminal n.
- face
- upper lip
- maxillary teeth
- mucosa of nose
- maxillary sinuses
- palate
Sensory function of the mandibular division of the trigeminal n.
- mandible
- lower lib
- mandibular teeth
- TMJ
- mucosa of mouth
- anterior 2/3 of tongue
Motor function of the mandibular division of the trigeminal n.
- temporalis m.
- masseter m.
- lateral pterygoid m.
- medial pterygoid m.
- tensor veli palatini m.
- tensor tympani m.
- mylohyoid m.
- anterior belly of digastric m.
Which nerve innervates the meninges?
Trigeminal n.
(general sensory to the meninges)
