Cranial Nerves General Flash Cards

Question 1

CN IV

Answer 1

CN IV - TROCHLEAR

Somatic Motor - Eye Movement

Foramen - Superior Orbital Fissure

Lesion - Inability to look down and out; diplopia

Question 2

CN VI

Answer 2

CN IV - ABDUCENS

Somatic Motor - Eye Movement

Foramen - Superior Orbital Fissure

Lesion - Lateral gaze palsy and diplopia

Question 3

CN IX

Answer 3

CN IX - GLOSSOPHARYNGEAL

• Pharyngeal Motor - Motor to stylopharyngeus muscle
• Visceral Motor - Otic ganglia then parotid
• Special Sense - Poster 1/3 Taste
• Somatic Sense - Sensation in external auditory meatus
• Visceral Sense - from carotid body/sinus, parotid, and pharynx

Foramena - Jugular

Lesion - Difficulty swallowing and loss of gag reflex, dec secratory fxn, loss of post. 1/3 taste, loss of sense in ext auditory meatus, possible brady/tachycardia

Question 4

CN XII

Answer 4

CN XII - HYPOGLOSSAL

Somatic Motor - Motor to extrin/intrin tongue muscles

Foramena - hypoglossal canal

Lesion - deviation of tongue on protusion

Question 5

CN III

Answer 5

CN III - OCULOMOTOR

• Sommatic motor - Eye Movement
• Visceral motor - Pupil Constriction

Foramen - Superior Orbital Fissure

Lesion - Paralysis of most eye movement and diplopia; Pupillary dilation and loss of efferent limb corneal reflex

Question 6

CN VIII

Answer 6

CN VIII - VESTIBULOCOCHLEAR (AUDITORY)

Special Sense - Hearing, Balance, and Equilibrium

Foramena - Internal Acoustic Meatus

Lesions - Deafness, tinnitus, vertigo, unsteady gait, and nystagmus

Question 7

CN XI

Answer 7

CN XI - SPINAL ACCESSORY

Somatic Motor - Motor to sternocleidomastoid and trapezius muscles

Foramena - Enters Foramena Magnum and Exits Jugular

Lesion - Weakness of trapezius and sternocleidomastoid

Question 8

CN II

Answer 8

CN II - OPTIC NERVE

Special Sense- Vision

Foramen- Optic Canal

Lesion- Blindness, hemianopia, quadrantanopia, and loss of afferent limb corneal reflex

Question 9

CN VII

Answer 9

CN VII - FACIAL NERVE

• Pharyngeal Motor - Motor to muscles of facial expression
• Visceral Motor - to parasympatheric ganglia
• Special Sense - Anterior 2/3 taste
• Somatic Sense - sensation on pinna
• Visceral Sense - Visceral sense from saliary glanfs

Foramena - Internal Acoustic meatus and Stylomastoid

Lesion - Weakness/Paralysis of facial muscles and loss of effent limb corneal reflex, decrease in secreations, loss of taste on ant. 2/3, and loss of ear sensation

Question 10

CN X

Answer 10

CN X - VAGUS

• Pharyngeal Motor - Constrictors of pharynx, intrinsic larynheal muscles, palate, upper esophagus, and vocalis
• Visceral Motor - to ganglia in traches, bronchi, gut, heart
• Special Sense - Taste on the epiglottis, base of tongue
• Somatic Sense - sensation on eardrum, ext aud meatus
• Visceral Sense - Larynx, pharynx, heart, trachea and bronchi, esophagus, and gut

Foramena - Jugular

Lesion - Dysphagia, Loss of vocalis (hoarseness), loss of gag reflex, dec in secreatoru, loss of taste on epiglottis, dec in sensations from viscera

Question 11

CN I

Answer 11

CN I - OLFACTORY NERVE

Special Sense - Sense of Smell

Foramen- Ethmoid Foramina of Cribiform Plate

Lesion - Anosmia, hyposmia, hyperosmia, and olfactory hypesthesia/hyperesthesia

Question 12

CN V

Answer 12

CN V - TRIGEMINAL

• Somatic Sense - sensation to face, sinuses, oral cavity, teeth, eyelids, cornea, tongue, forehead, TMJ, and palate
• Pharynheal motor - motor to masticatoru muscles plus others

Foramena - Standing Room Only

• V1 - Superior Orbital Fissure
• V2 - Foramen Rotundum
• V3 - Foramen Ovale

Lesion - Loss of sensory of face, loss of jaw jerk reflex, masticatory muscle weakness/paralysis