Crainal Nerves Flashcards
1
Olefactory
Cribform plate of ethmoid
Sensory
Sense of smell. Assess each nostril separately.
2
Optic
Optic Canal
Sensory
3
Oculomotor
Superior Orbital Fissure
Motor
4
Trochlear
Superior Orbital Fissure
“H”
Motor: Superior Oblique Muscle.
5
Trigeminal
V1 - Ophthalmic - sensory
V2 - Maxillary - sensory
V3 - Mandibular - sensory motor
V1 - Superior Orbital Fissure
V2 - Foramen Rotundum
V3 - Foramen Ovale
V1 - Scalp, forehead, nose
V2 - Cheeks, lower eyelid, nasal mucosa, upper lip, upper teeth, palate.
V3 -
S: Anterior 2/3 tongue, skin over mandible, Lower teeth. M: Muscles of mastication.
6
Abducens
Superior Orbital Fissure
Motor: Lateral Rectus
“H” points 2&5
7
Facial
Internal Auditory/Acoustic Meatus
Sensory: External Ear, taste anterior 2/3 tongue, hard and soft palate.
Motor: Muscles of facial expression, lacrimal, submandibular, sublingual gland and mucose gland of mouth and nose.
8
Acoustic or Vestibulocochlear
Internal Auditory Meatus
Sensory: Hearing and balance.
Tinnitus and loss of balance
9
Glossopharyngeal
Jugular Foramen
Sensory: Posterior 1/3 tongue, external and middle ear cavity, carotid body, sinus, taste posterior 1/3 tongue.
Motor: Parotid gland, stylopharynges.
10
Vagus
Jugular Foreman
Sensory: External ear, larynx, pharynx, taste epiglottis of tongue.
Motor: Smooth muscles pharynx and larynx.
11
Spinal Accessory
Jugular Foramen
Motor: Trapezius, SCM.
12
Hypoglossal
Hypoglossal Canal
Motor: Intrinsic and extrinsic tongue muscles.
What are Cranial Nerves?
Components of the peripheral nervous system that connect to the brain (not the spinal cord). Numbered according to their position along the longitudinal axis of the brain, beginning at the CEREBRUM.
Motor nuclei of these nerves lie in the brain stem of the Mid-Brain, Pons and Medulla. They are acted upon by nerve impulses from various sources.
Can be sensory, motor or mixed.
Swelling or bleeding within the meninges or brain can shift the brain and compress the openings.
