Cranial Nerves Flashcards
I
Olfactory (sensory)
II
Optic (sensory)
III
Oculomotor (motor)
IV
Trochlear (motor)
V
Trigeminal (sensory & motor)
Anterior 2/3 tongue
VI
Abducens (motor)
VII
Facial (sensory & motor)
Taste to anterior 2/3 tongue
VIII
Vestibulocochlear (sensory)
Acoustic/auditory
IX
Glossopharyngeal (sensory & motor)
Posterior 1/3 tongue
X
Vagus (sensory & motor)
SLN & RLN
XI
Spinal accessory (motor)
XII
Hypoglossal (motor)
Below/behind the tongue
Impaired nerve or injury → airway obstruction d/t tongue relaxation
Superior laryngeal nerve
Innervates above the vocal cords
Internal branch SIS
External branch SEM
SLN Internal Branch
Sensory above the vocal cords
SLN External Branch
Motor
LARYNGOSPASM
Recurrent Laryngeal Nerve
Sensory & motor
Sensation to larynx below the vocal cords
Innervates all larynx muscles except cricothyroid
Nerve risk injury d/t loop around carotid artery