Lecture 7 - Brainstem and Cranial Nerves Flashcards
Which cranial nerve does not go through the thalamus ?
Olfactory nerve
olfactory nerves passes through skull via ____ ______?
cribiform plate
Which nerves have mixed sensory and motor components ?
CN V, VII, IX, X
the brainstem contains nuclei of which cranial nerves?
CN 3-12
which nerve is seen from the anterior surface of the midbrain?
CN III
the deep midline depression of the midbrain is called?
interpeduncular fossa
what system is the superior colliculi responsible for?
visual system
which 3 nerves emerge between pons and medulla?
CN VI – abducens nerve
CN VII – facial nerve
CN VIII – vestibulocochlear
True of false: the pyramids contain ascending motor pathways ?
False. descending motor pathways
what is the function of the decussation of the pyramids?
cross-over of descending motor pathway
which cranial nerve arises from the inferior olive and the pyramids ?
Hypoglossal nerve (CN XII)
Which 3 nerves are seen form the lateral surface of the medulla oblongata ?
CN IX: glossopharyngeal
• CN X: vagus nerve
• CN XI: accessory nerve (cranial roots)
True or false: Gracilis and cuneate nuclei are nuclei for one of the ascending motor pathways
false. ascending sensory pathways
true of false. the information about smell travels by olfactory tract along ventral surface of frontal lobes
true
which nerve supplies the lateral rectus muscle?
abducens nerve
the 2 oblique eye muscles both have the same function as they move the eye medially or laterally?
medially
the Oculomotor nerve supplies which 4 muscles ?
inferior rectus
superior rectus
medial rectus
inferior oblique
the levator palpabrae is responsible for what function ?
lifting upper eyelid
how do you test and isolate the superior rectus?
look out, then up
how do you test and isolate the Inferior oblique?
look in and up
which cranial nerves pass through the superior orbital fissure?
CN III, IV, VI
and V1 ophthalmic branch of CN V
which nerve passes through the cribriform plate ?
CN 1
the trigeminal nerve has a large sensory root that expands to form trigeminal ganglion near which sinus?
cavernous sinus
what are the 3 sensory components of the trigeminal nerve ?
V1 = ophthalmic nerve, V2 = maxillary nerve, V3 = mandibular nerve
which nerve is involved in the sensation of touch for the anterior 2/3’s of the tongue ?
Trigeminal Nerve (CN V)
True or false? Bells Palsy produces contralateral facial muscle weakness.
false. ipsilateral
which cranial nerve supplies muscles of pharynx (swallowing) and larynx (speech)?
Vagus nerve (CN X)
the accessory nerve supplies which 2 muscles?
sternocleidomastoid and trapezius muscles
which nerve supplies all intrinsic tongue muscles and extrinsic muscles controlling tongue?
Hypoglossal Nerve (CN XII)
true or false: ipsilateral tongue weakness causes the tongue to deviates towards the opposite side of the lesion.
false.towards the same side of the lesion
the jugular foramen allows which nerves to pass through?
CN IX, X, XI
which nerves have a parasympathetic component ?
III, VII, IX, X
what is the function of the optic nerve?
function: carries visual information from retina
true or false? information about smell travels by olfactory tract along ventral surface of frontal lobes ?
true
Gracilis and cuneate nuclei are nuclei for one of the ascending ______ pathways (answer: sensory or motor)
sensory
