Cranial Nerves Flashcards
Merkel discs
Light touch
Meissner’s corpuscle
Touch/pressure
Ruffini endings
Stretch
Hair follicle receptor
Deflection of hair
Free nerve endings
Pain or temperature
Pacinian corpuscle
Vibration
Attachment - CN I and II
Attach to skull
Attachment - CN III - XII
Attach to brainstem
What is the only cranial nerve that serves structures other than brain and neck?
CN X (vagus) - it extends to the abdomen
What are the sensory CN?
CN I, II, and VIII
What are the motor CN?
CN III, IV, VI, XI, XII
What are the mixed CN?
CN V, VII, IX, and X
Which CN carry parasympathetic fibers?
CN III, VII, IX, and X
CN I
Olfactory nerve (cribriform plate of ethmoid bone)
CN II
Optic nerve
CN III
Oculomotor + paraysympathetic for pupil constriction
CN IV
Trochlear
CN VI
Abducens
CN V
Trigeminal nerve
Main general sensory for the skin of the face, nasal cavity, oral cavity, teeth, and eyes; innervated the dermatomes of the face and muscles of mastication
CN VII
Facial
Mixed
Motor: Muscles of facial expression
Parasympathetic: Salivary glands and lacrimal glands
Taste: Anterior part of tongue
CN VIII
Vestibulocochlear
Hearing and balance
CN IX
Glossopharyngeal
Mixed nerve
General sensory: Back of tongue and throat
Taste: Back of tongue
Chemo and baroreceptors in carotid arteries
Parasympathetic: Parotid salivary gland
CN X
Vagus
Mixed nerve
Parasympathetic: Thoracic and abdominal viscera
Visceral sensory: from thoracic and abdominal viscera
Somatic motor: Muscles in pharynx and larynx
CN XI
Accessory nerve (sternocleidomastoid/trapezius)
CN XII
Hypoglossal nerve
Intrinsic and extrinsic tongue muscles
