Nerves Flashcards
Olfactory nerve passes through the ______________ (bony landmark)
cribiform plate
Optic nerve passes through the ________ (bony landmark)
optic canal
Optic chiasm located in __________ (bony landmark)
sulcus chiasmaticus
Nasal vs. temporal retina
Nasal = medial –> cross to contralateral optic tract via optic chiasm
Temporal = lateral –> remain in impsilateral optic tract
Optic nerve synapses in the _________ and ________ nuclei
lateral geniculate, midbrain
Optic nerve
special sensory (vision)
Occulomotor nerve originates from the ________ nucleus and _________ nucleus located in the __________
oculomotor, Edinger-Westphal
Midbrain
Superior ramus of oculomotor nerve innervates (motor) __________ and _________ muscles
levator palpebrae superioris
superior rectus
Inferior ramus of oculomotor nerve innervates _________, ________, and _______ muscles
Medial rectus
Inferior rectus
Inferior oblique
The inferior ramus of the oculomotor nerve carries _________ axons while the superior ramus does not
preganglionic parasympathetic
Postganglionic parasympathetic innervation of the oculomotor nerve is responsible for ________ and ___________
Accommodation of the ciliary body (muscle)
Constriction of the iris
Postganglionic sympathetic innervation of the oculomotor nerve is responsible for ___________
dilation of the iris
Unaccomodated lens
flat lens, distant vision, zonule fibers contracted when ciliary muscle is relaxed
Accomodated lens
thick lens, near vision, zonule fibers relaxed when ciliary muscle contracts
Cranial nerves passing through the superior orbital fissure
oculomotor nerve
trochlear nerve
trigeminal nerve (opthalmic branch)
Abducens nerve
Nerves originating in the midbrain (mesencephalon)
oculomotor nerve
trochlear nerve
trigeminal nerve (opthalmic branch)
Motor axons of the trochlear nerve (IV) innervate the _________ muscle
superior oblique
Abducens nerve (VI) originates in the _________
pons
Abducens motor neuron innervates _________ muscle
lateral rectus
Hypoglossal nerve (XII) originates in the __________
medulla
Hypoglossal nerve emerges between the ________ and ________ of the medulla
pyramid, olive
Damage to the right hypoglossal nerve results in _______________
deviation of the tongue to the right
Motor nerves of the hypoglossal nerve (XII) originate in the ____________ and innervate __________ (4) (muscles)
hypoglossal nucleus of the medulla
Genioglossus
Hyoglossus
Styloglossus
Intrinsic muscles of the tongue
Cranial nerve pneumonics:
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I. Olfactory II. Optic III. Occulomotor IV. Trochlear V. Trigeminal VI. Abducens VII. Facial VIII. Vestibulocohlear IX. Glossopharyngeal X. Vagus XI. Accessory XII. Hypoglossal
Cranial nerve pneumonic for sensory and motor
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(S= Sensory, M= Motor, B= Both)
The long ciliary nerve innervates __________
cornea
The short ciliary nerve innervates ___________ and passes through the ____________
cornea ciliary ganglion (where postganglionic parasympathetic axons arise)
The posterior ethmoidal nerve innervates
the sinus
External nasal nerve innervates ___________
skin (nose)
Internal nasal nerve innervates ___________
mucosa (nasal cavity)
Infratrochlear nerve innervates ____________
skin (nose)
The supraorbital nerve passes through the _________ (bony landmark) and innervates ___________
supraorbital foramen
skin (lid, scalp, forehead)
The supratrochlear nerve innervates ____________
skin (lid, scalp, forehead)
The lacrimal nerve innervates ________________
skin (lid scalp, forehead)
Trigeminal nerves originate from the _____________
pons
Spinal accessory nerve (XI) originates in _______________
C1-C5 spinal accessory nucleus
Motor cell bodies of the spinal accessory nerve (XI) originate in ___________
C1-C5 spinal accessory nucleus
Spinal accessory nerve passes through __________, then __________ (bony landmark) before innervating ____________ and _________ muscles
Foramen magnum
Jugular Foramen
Sternocleidomastoid
Trapezius
The zygomatic nerve innervates _________
skin of cheek bone
The infraorbital nerve innervates __________ and ____________
skin (nose, lower lid, upper lip, cheek)
Mucosa (maxillary sinus, upper lip, labial gingiva)
Anterior superior alveolar nerve innervates ____________ and __________
pulp (upper incisors, canines)
mucosa (maxillary sinus)
Middle superior alveolar nerve innervates _________ and ___________
pulp (upper premolars)
Mucosa (maxillary sinus)
Posterior superior alveolar nerve passes through the __________ (bony landmark)
pterygomaxillary fissure
Posterior superior alveolar nerve innervates _________ and __________
pulp (upper molars)
Mucosa (maxillary sinus, buccal gingiva)
_________, _________, and _________ nerves pass through the sphenopalatine foramen
lateral posterior superior nasal
medial posterior superior nasal
nasopalatine
Lateral posterior superior nasal nerve innervates _____________
mucosa (nasal cavity)
Medial posterior superior nasal nerve innervates ____________
mucosa (nasal cavity)
Nasopalatine nerve passes through _____________ (bony landmark) distal to the sphenopalatine foramen
incisive fossa
Nasopalatine nerve innervates _____________
mucosa (hard palate)
Greater palatine nerve passes through the __________ (bony landmark) and innervates ______________
greater palatine foramen
Mucosa (nasal cavity, hard palate)
INCLUDES TASTE
The lesser palatine nerve passes through the ____________ (bony landmark) and innervates _____________
lesser palatine foramen
Mucosa (soft palate)
INCLUDES TASTE
The pharyngeal nerve passes through the ____________ (bony landmark) and innervates ______________
paatovaginal canal
Mucosa (nasal pharynx)
The _________ branch of the mandibular nerve emerges from the foramen spinosum and innervates ____________
meningeal
cranial dura
Deep temporal nerve innervates _________
temporalis
Masseteric nerve innervates ___________ and ________
masseter
TMJ
Long buccal nerve innervates _____________
skin/mucosa of buccal gingiva, cheek
Lingual nerve innervates ____________
mucosa - anterior 2/3 of tongue (including taste), lingual gingiva, floor of oral cavity, muscles of the tongue (including a hyoid muscle)
Incisive nerve innervates _________ and _________
pulp - canines and incisors
Mental nerve innervates __________
skin/mucosa of lower lip and labial gingiva
Auriculotemporal nerve innervates __________
skin - parotid gland, ear, temple, TMJ
Temporal nerve innervation (2)
frontalis, orbicularis oculi
Zygomatic nerve innervation (4)
orbicularis occuli
zygomaticus major
levator anguli oris
levator labii superioris
Buccal nerve innervation (6)
Buccinator depressor anguli oris levator labii superioris nasalis orbicularis oris zygomaticus major
Marginal mandibular nerve innervation (4)
depressor anguli oris
depressor labii inferioris
mentalis
orbicularis oris
Cervical nerve innervation (1)
platysma
Facial nerve (VII) originates in the ____________
pons
The Chorda Tympani nerve of the Facial nerve passes through _______ before becoming the _________ nerve
petrotympanic fissure
Lingual nerve
The Vestibulocochlear nerve (VIII) traverse the ___________ with the ___________ nerve
Internal Auditory Meatus Facial Nerve (VII)
The vestibulocochlear nerve originates in the ___________ from the __________ and _______ nuclei
medulla
cochlear and vestibular nuclei (–> roots)
All the cell bodies for the postganglionic sympathetic cells are located in the _____________
superior cervical ganglion
The ___________ nerve provides taste to the posterior 1/3 of the tongue
Lingual branch of the glossopharyngeal nerve
You can test the glossopharyngeal nerve function with the ___________
gag reflex
Glossopharyngeal nerve originates in the ____________
medulla
Vagus, Pharyngeal nerve innervates…
muscles of the palate/pharynx except for tensor palatini (the italian) and stylopharyngeus (innervated by glossopharyngeal)
Vagus, Internal laryngeal nerve innervates…
sensory and TASTE - epiglottis –> vocal folds
[mucosa of pharynx and larynx, NOT oral cavity]
Vagus, External laryngeal nerve innervates…
cricothyroid muscle
inferior constrictors
Vagus, Recurrent laryngeal innervates…
Muscles of larynx except for inferior constrictors and the cricothyroid muscle (done by external laryngeal nerve)
Sensory of vocal folds –> trachea [mucosa pharynx and larynx]
[NO hyoid bone muscles]
Vagal trunk innervates…
sensory to the left colic flexure
Vagus, Auricular nerve innervates…
skin - ear