Cranial nerves Flashcards
Which cranial nerve is responsible for shoulder elevation and head turning?
Cranial Nerve XI. Accessory spinal nerve
Cranial nerves responsible for eye movement
III, IV and VI
3 branches of the largest cranial nerve
Ophthalmic, maxillary and Mandibular
Cranial nerves involved in taste
The facial nerve (CN VII) senses taste from the anterior 2/3 of the tongue. The Glossopharyngeal nerve (CN IX) does the posterior 1/3. The Vagus (CN X) nerve senses taste from the extreme posterior.
Cranial nerve involved in lateral rectus palsy
Abducens:
The lateral rectus muscle is innervated by CN VI (abducens nerve). Remember “LR6 SO4 the rest 3”. (Lateral rectus innervated by CN VI, Superior oblique innervated by CN IV, the rest of the eye muscles are controlled by CN III)
Cranial nerve VIII?
Vestibulocochlear: Hearing and Balance
Cranial nerve III?
The oculomotor nerve (CN III) is responsible for controlling the superior rectus, inferior rectus, medial rectus, and inferior oblique muscles of the eye.
It is also involved in controlling the levator palpebrae muscle for opening the eyelid.
CN III is also used to control pupil constriction and accommodation.
Cranial nerve for tongue movement but not taste
CN XII; Hypoglossal nerve
Controls rotating the eye towards the nose & moving the eye downward
Trochlear
Partially controls taste & some muscles used for swallowing. Taste perception: posterior ⅓ of the tongue (lingual branch)
Glossopharyngeal (CN IX)
Taste from posterior 1/3 of tongue, swallowing, salivation (parotid gland),
monitoring carotid body and sinus chemo- and baroreceptors.
Glossopharyngeal (CN IX)
Vagus nerve
Taste from epiglottic region, swallowing, palate elevation, talking,
thoracoabdominal viscera, monitoring aortic arch chemo- and baroreceptors.
Involved in controlling heart rate, speech, digestion, and sweating
Vagus nerve
Involved in lacrimation (producing tears)
Facial nerve
Which of the following cranial nerves is involved in getting the lens of the eye to focus on an object?
Oculomotor