Branches of cranial nerves Flashcards
What route does the olfactory nerve take [I]?
From olfactory receptors in nasal cavity –> cribriform plate foramina –> olfactory bulb
What route does the optic nerve take [II]?
Retina –> optic nerve –> Optic canal –> Optic chiasm
What route does the oculomotor nerve take [III]?
Midbrain –> cavernous sinus –> superior orbital fissure –> Orbit
What route does the trochlear nerve take [IV]?
Posterior of midbrain –> Cavernous sinus –> Superior orbital fissure –> superior oblique muscle
What route does the trigeminal nerve take [V]?
Pons –> trigeminal ganglion –> V1, V2, V3
What route does the Ophthalmic division of trigeminal nerve take [V1]?
Trigeminal ganglion –> Superior orbital fissure –> Orbit and forehead region
What route does the maxillary division of trigeminal nerve take [V2]?
Trigeminal ganglion –> infra-orbital foramen
What route does the mandibular division of trigeminal nerve take [V3]?
Trigeminal ganglion –> Mental foramen
What route does the abducens nerve take [VI]?
Pons –> cavernous sinus –> superior orbital fissure –> lateral rectus
What route does the facial nerve proper take [VII]?
Pons –> internal acoustic meatus –> Facial canal –> stylomastoid foramen –> parotid gland
What route does the Chorda tympani nerve take [VII]?
Pons –> IAM –> Tympanic membrane –> Petrotympanic fossa –> Travels with lingual branch of V3
What route does the Greater petrosal nerve take [VII]?
IAM –> Hitchhikes with V2 and V1 to lacrimal gland
What route does the glossopharyngeal nerve take [IX]?
Medulla –> jugular foramen
What route does the vagus nerve take [X]?
Medulla –> jugular foramen
What route does the spinal accessory nerve take [XI]?
Cervical spinal cord –> Foramen magnum –> Back down through jugular foramen
What route does the hypoglossal nerve take [XII]?
Medulla –> Hypoglossal canal
What route does the hypoglossal nerve take [XII]?
Medulla –> Hypoglossal canal
Give the branches of the oculomotor nerve (3)
Superior branch
Inferior branch
Oculomotor root to ciliary ganglion
Give the branches of the trigeminal nerve (5)
Sensory root Motor root Ophthalmic Maxillary Mandibular
Give the branches of the Ophthalmic division of trigeminal nerve (16)
Tentorial Lacrimal Frontal - Supra-orbital - Supratrochlear Nasociliary - Anterior ethmoidal --> external nasal - Long ciliary - Posterior ethmoidal - Anterior ethmoidal (lateral and medial internal nasal, external nasal) - Infratrochlear (palpebral)
Give the branches of the Maxillary division of trigeminal nerve (17)
Meningeal Ganglionic branches (to pterygopalatine ganglion) - Orbital - Nasal - Pharyngeal Greater palatine - Posterior inferior nasal Lesser palatine Zygomatic - Zygomaticotemporal - Zygomaticofacial Infra-orbital - Superior alveolar - Inferior palpebral - External nasal - Internal nasal - Superior labial
Give the branches of the mandibular division of trigeminal nerve (24)
Meningeal Masseteric Deep temporal Nerve to lateral pterygoid Nerve to medial Pterygoid - Nerve to tensor veli palatini and tensor tympani via otic ganglion Buccal Auriculotemporal - Nerve to EAM - Tympanic membrane - Communicating branches with facial nerve - Anterior auricular - Superficial temporal Lingual - Communicating with hypoglossal nerve - Communicating with Chorda tympani nerve - Sublingual - Lingual - Ganglionic branches to submandibular ganglion Inferior alveolar - Mylohyoid - Inferior dental plexus - Mental (inferior labial)
Give the branches of the facial nerve (16)
Greater petrosal Nerve to stapedius Chorda tympani Communicating branch with tympanic plexus Communicating branch with vagus nerve Posterior auricular - Occipital - Auricular - To digastric - To stylohyoid - Communicating with glossopharyngeal Parotid plexus - Temporal - Zygomatic - Buccal - Marginal mandibular - Cervical
Give the branches of the vestibulocochlear nerve (2)
Cochlear
Vestibular
Give the branches of the Glossopharyngeal nerve (9)
Tympanic - Tubal - Caroticotympanic - Lesser petrosal Carotid sinus Pharyngeal Muscular Tonsillar Lingual
Give the branches of the vagus nerve (22)
Meningeal Auricular Pharyngeal Superior cervical cardiac Carotid body Superior laryngeal - Internal laryngeal - External laryngeal Inferior cervical cardiac Recurrent laryngeal - Tracheal - Oesophageal - Inferior laryngeal Thoracic cardiac Bronchial Oesophageal plexus Anterior vagal trunk - Gastric - Hepatic Posterior vagal trunk - Coeliac - Gastric
Give the branches of the Accessory nerve (2)
Internal ramus
External ramus
Give the branches of the hypoglossal nerve (2)
Lingual
Muscular
Give the cervical plexus branches and their spinal roots (7)
Lesser occipital, C2 Great auricular, C2,C3 Transverse cervical, C2, C3 Supraclavicular, C3, C4 Phrenic, C3, C4 and C5 Communicating Muscular, C1, C2 and C3
