Cranial Nerve Review Study Notes

Course and Document Information

  • Document Title: Cranial Nerve Review

  • Creator: Carolyn Bornbach

  • Institution: UWSP BIO 387

  • Image Attribution: All images are sourced from AMBOSS.

  • Mandatory Study Note: Students must be familiar with both the Roman mimeral and the name of each cranial nerve.

CN II: Olfactory Nerve

  • Functional Sense: SMELL

  • Transcription Details:    

  • Anatomical Components identified:     - 2.2. olfactory nerve     - 3.3. Olfactory bulb     - 4.4. Olfactory tract

  • Reference Number: 101507101507

CN IIII: Optic Nerve

  • Functional Sense: EYESIGHT

  • Transcription Details:     - No HoundA

  • Visual Pathway Components:     - optic nerve #     - optic chiasma     - optic tract     - Lateral genistkate body     - Optic radation

CN IIIIII: Oculomotor Nerve

  • Innervation Overview: This nerve innervates 55 specific muscles.

  • Innervated Muscles:     - 1.1. superior rectus     - 3.3. medial rectus     - 4.4. inferior rectus     - 5.5. inferior oblique p

  • Muscles NOT Innervated by CN IIIIII:     - Lateral rectus (Innervated by CN−VICN-VI)     - superior oblique (Innervated by CN IVIV)

  • Transcription Detail: (C) merve

CN IVIV: Trochlearve

  • Muscle Innervated: Superior oblique (this is the only muscle it innervates).

  • Functional Action: Depresses an adducted eye.

CN VV: Trigeminalverve

  • Anatomical Divisions:     - CN−VCN-V: Opthalmic     - Mandibular CN−V3CN-V3

  • Motor Function: Carried by the Mandibular division (CN−V3CN-V3).

  • Primary Sensory Role: Facial sensation.

CN VIVI: Abducens Nerve

  • Muscle Innervated: Lateral rectus (this is the only muscle it innervates).

  • Functional Movement: Abduction.

CN VIIVII: Facial Nerve

  • Motor Function: Muscles of facial expression.

  • Parasympathetic Innervation Targets:     - Lacrimal gland     - sublingual and submand grands

CN VIIIVIII: Vestibulocochlear

  • Two Major Functions:     - 1.1. Hearing     - 2.2. Balance

CN IXIX: IN ZX-glossopharyngeal

  • Sensory Component:     - Reflex: gag reflex

  • Parasympathetic Function:     - Process: Salivation     - Target: parotid gland

  • Motor Component:     - Muscle Innervated: pharyngeal muscles used for swallowing.

CN XX: VO Vagus Nerve

  • Reflex: Cough reflex

  • Parasympathetic Functions:     - Heart Rate (HRHR)     - vasodilation     - 11 Gl motility     - etc…

CN XIXI: Accessory Nerve (spinal)

  • Muscles Innervated:     - Sternocleidomastoid     - trapezius

  • Physical Actions:     - HEAD TURN     - SHOULDER ELEVATION

CN XIIXII: Hypoglossal verve uplido al

  • Nerve Control: Muscles of the tongue.