Flashcards in Weekly assesment questions (1) Deck (55):
Location of Asterion
asterion is located laterally on the skull at the junction of the lambdoid, occipitomastoid and parietom astoid sutures.
This craniometric point long the sagittal suture represents the most superior aspect of the skull
located posteriorly on the skull at the junction of the sagittal and lambdoid sutures
located superiorly on the skull at the junction of the coronal and sagittal sutures
In an industrial accident, a 58 y.o. man suffers a fracture of the inferior portion of the lateral margin of the orbit. Which bone contributes to this margin of the orbit
bone forms the inferolateral and lateral margins of the orbit
contributes to the medial aspect of the orbit.
bone does not contribute to the orbital margin. It forms the bridge of the nose
contributes to the medial aspect of the inferior orbital margin
passes through the substance of the parotid gland.
It innervates the muscles of facial expression.
Damage to the nerve will result in facial droop.
Innervation to the parotid gland is via the
glossopharyngeal n. (CN IX)
Innervation of the submandibular and sublingual salivary glands is provided by
the chorda tympani nerve. .
Chorda Tympani is a branch of
This branch of CN VII
Path of Chorda Tympani
exits the skull via the petrotympanic fissure and does not pass through the substance of the parotid gland
Sensory innervation of the check is provided by the
Buccal Nerve is from:
of the mandibular division of the trigeminal nerve (CN V).
The hypoglossal nerve (CN XII) damage
The spinal accessory nerve innervates
the sternocleidomastoid muscle and the trapezius muscle.
ansa cervicalis overlies the
carotid sheath which is deep to the sternocleidomastoid.
Its branches innervate the infrahyoid muscles.
These nerves are sensory branches from C3 and C4.
This nerve runs in a groove between the trachea and esophagus.
It provides motor innervation to intrinsic laryngeal muscles.
is a sensory branch from C2.
The lesser occipital nerve
The artery crosses the mandible just anterior to the masseter muscle.
is a branch of the superficial temporal artery
provides sensory innervation to the tip of the nose, the bridge of the nose, upper eyelid, the forehead and anterior scalp.
provides sensory innervation to the upper lip, prominence of the cheek, lower eyelid and along the lateral aspect of the orbit.
orbicularis oculi muscle, a muscle of facial expression, is innervated by
the facial nerve
These three nerves are purely motor nerves that innervate the extraocular muscles.
III, IV, VI
nerve is a purely sensory nerve associated with the special sense of vision.
provides sensation from the lower jaw and side of the face and provides motor innervation to the muscles of mastication
nerve both pass through the internal acoustic meatus
Vestibulochoclear and Facial
which innervates the muscles of mastication, passes through the foramen ovale.
Mandibular division of trigeminal V3
Damage to V3
hard to chew and sensation on lower jaw
Hoarseness could result from injury to
the recurrent branch of the vagus nerve (CN X).
CN X exits the skull through the
) courses anteriorly through the submandibular triangle on its way to innervate the tongue.
hypoglossal nerve (CN XII)
When doing surgery near the submandibular gland, the surgeon would try to identify this nerve as to not damage it while removing the tumor.
Hypoglossal nerve XII
maxillary nerve is a branch (V2) of the trigeminal nerve (CN V) that exits the skull via
the foramen rotundum and enters the pterygopalatine fossa where it branches into the orbit and other areas of the midface
the facial vessels course through the submandibular triangle, the facial nerve
The facial nerve exits from the ________________ in the skull and passes through the ____________, at which point it branches into five major branches.
the mandibular nerve (V3) is a branch of the trigeminal nerve (CN V) that exits the skull via the
foramen ovale to enter the infratemporal fossa and branches extensively.
accessory nerve exits the skull base via the _________ and travels deep to the sternocleidomastoid muscle. It is not located near the submandibular gland.
A 43-year-old patient sees his doctor because of loss of bitter and sour taste on the back 1/3 of his tongue and trouble swallowing. Identify the cranial nerve most likely to be injured in this patient
carries special sensory taste fibers from the posterior 1/3 of the tongue. When damaged, taste from the posterior 1/3 of the tongue is lost. Similarly, this nerve also contributes to the pharyngeal plexus, which can lead to impaired swallowing if this nerve is damaged
is responsible for innervation of the superior oblique extraocular muscle
CN IV, or the trochlear nerve
provides motor innervation to most of the extraocular muscles of the eye, in addition to controlling constriction of the pupil and maintaining an open eyelid.
Oculomotor nerve III
nerve, provides sensory innervation to the lower lip, along the mandible, and the area anterior to the ear, coinciding with this patient’s loss of sensation.
CN V, or the trigeminal
Responsible for taste sensation for the anterior 2/3 of the tongue.
Chorda tympani of Facial nerve
damage to the facial nerve would cause
facial paralysis and taste impairment on the anterior 2/3 of the tongue
Hyperacusis would result from damage to
branch of the facial nerve: the nerve to the stapedius.