Exam 3 review Flashcards
Which pair of laryngeal cartilages are able to rotate in order to change the tension of the vocal ligaments?
Arytenoids
The arytenoid cartilages are able to rotate on which other paired cartilages?
corniculates
What ligament extends from the base of the zygomatic process to the mandibular neck?
Temporomandibular
Identify the boundaries of the infratemporal fossa.
Slides words exactly:
superior = greater wing of sphenoid
lateral = coronoid process and ramus of mandible
inferior = continuous with neck
posterior = TMJ and styloid
the picture is good otherwise
List the contents of the infratemporal fossa.
Mandibular Nerve (CNV3/ branch of the Trigeminal Nerve), Maxillary Artery, medial and lateral pterygoid, lower part of temporalis mm, chorda tympani nerve (stems from CNVII/facial responsible anterior 2/3 sensation of tongue),
Blood supply to the larynx is through the superior and inferior laryngeal arteries, which themselves are direct branches from what arteries?
superior laryngeal artery branches from the superior thryoid artery
inferior laryngeal artery branches from the inferior thyroid artery
What structure(s) passes through the superior and middle pharyngeal constrictors?
Stylopharyngeus M, CN IX/ glossopharyngeal N, and Facial Artery branch called tonsillar.
Which branch from the internal carotid artery supplies areas of the face?
supratrochlear, supraorbital, [first two mostly forehead and scalp] and angular arteries.
Identify the component arterial branches that make up the circle of Willis.
Compare the organization of the meninges and related spaces of the brain to those of the spinal cord.
Superfical to deep..
Epidural space (absent around brain; @ spine conatins fat and internal venous plexus)
dura mater
subdural space
leptomeninx- (arachnoid membrane, arachnoid villi in the subarachnoid space, pai mater)
The pia mater forms to the brain following all the contours and sulci
Describe the diaphragma sellae and its attachments.
it is a reflection of the dura mater.
layes over the hypophyseal fossa.
Attachments:
i. tuberculum sellae to the posterior clinoid process and dorsum sellae and covers the sella turcica and pituitary gland within
ii. medial continuation of the superior roof of the cavernous sinus
Which dural sinuses do/do not connect directly with the confluence of sinuses?
Identify the Falx Cerebri
Identify the Tentorium Cerebelli.
Identify Falx Cerebelli.
Cerebrospinal fluid circulates in which of the spaces associated with the meninges?
subarachnoid space.
Describe the flow of CSF through the subarachnoid space.
The anterior spinal artery is an unpaired artery that supplies part of the upper region of the spinal cord. It is formed from fused branches off which other arteries?
The vertebral arteries join to make both the Basilar Artery (which continues into the brain) and the Anterior Spinal Artery which heads in the opposite direction to supply the anterior aspect of the spinal cord.
Olfactory fibers making up the olfactory nerves pass from the olfactory mucosa to the olfactory bulbs through which structure? Axons that make up the optic nerve originate from which cells in the retina?
Olfactory fibers making up the olfactory Nn pass from the olfactory mucosa to the olfactory bulbs through which of the following? → cribriform plate
Ganglionic layer of retina (NOT rods and cones)
Describe the functions and innervation of the six extrinsic muscles of the eye.
Lateral Rectus.
Function: abducts eyeball
Innervation: CN VI
Describe the functions and innervation of the six extrinsic muscles of the eye.
Superior Oblique.
Function: abducts, depresses, medially rotates eyeball
innervation:CN IV
Describe the functions and innervation of the six extrinsic muscles of the eye.
Inferior Rectus.
Function: depresses, adducts, rootates eyeball laterally
Innervation: CN III
Describe the functions and innervation of the six extrinsic muscles of the eye.
Medial Rectus.
Function: adducts eyeball
Innervation: CN III
Describe the functions and innervation of the six extrinsic muscles of the eye.
Superior Rectus.
Function: elevates, adducts, medially rotates eyeball
Innervation: CN III
Describe the functions and innervation of the six extrinsic muscles of the eye.
Inferior oblique:
Function: abducts, elevates, laterally rotates eyeball
Innervation: CN III
Which cranial nerve supplies motor innervation to the sternocleidomastoid and trapezius muscles?
Spinal Accessory N (CN XI)
Which cranial nerve supplies extrinsic and intrinsic muscle of the tongue?
CN XII - hypoglossal nerve.
The spinal accessory nerve exits the cranial cavity through which foramen?
It and the vagus nerve leave through the jugular foramen.
CN II exits the skull through..
Optic Canal
CN XII exits the skull through..
the hypoglossal N exits via the hypoglossal foramen
What cranial nerves exit the cranial cavity through the superior orbital fissure?
III, IV, V-1(ophthalmic branch-frontal, lacrimal, nasociliary), VI
or
Occulormotor, Trochlear, trigemnial opthalimc, abducens
Parasympathetic fibers that control the shape of the lens and pupil are carried by which cranial nerve?
Oculomotor N (CN III)
The infraorbital, anterior superior alveolar, zygomatic, palatine, nasal, and posterior superior alveolar nerves are all branches of which cranial nerve?
CN V-2 or the maxillary branch of the Trigeminal Nerve. This exits the cranial cavity through the foramen rotundum.
The mandibular branch of the trigeminal exits the cranial cavity through which foramen?
foramen ovale
Cell bodies of sensory neurons carrying general sensory information from the dura of the middle and anterior cranial fossae, the external surface of the ear drum, and the anterior two-thirds of the tongue are located in which of the cranial ganglia?
Trigeminal (semilunar) ganglion GSS
Special visceral motor (SVM) modality supplies the stylopharyngeus muscle via which cranial nerve?
Glossopharyngeal N (IX)
The chorda tympani carries branches of which cranial nerve inside the petrous portion of the temporal bone?
Facial N (CN VII)
Taste sensation from the posterior third of the tongue is carried by which cranial nerve?
Glossopharyngeal N (IX) - SVS
Of the three auditory ossicles, which one is attached to the tympanic membrane?
Malleus attached to tympanic membrane
Incus
Stapes attached to oval window (fenestra vestibuli)
Stapedius muscle inserts onto neck of stapes
Most of the roof of the orbit is formed from which bone of the skull?
Orbital plate of frontal bone
The crista galli is an extension of which bone?
Ethmoid Bone
Parasympathetic supply to the lacrimal gland is via which cranial nerve?
Facial N (CN VII)
Cell bodies of the parasympathetic preganglionic fibers to the ciliary ganglion (source of cell bodies of postganglionic fibers to the sphincter pupillae muscle) are located in which nucleus?
Edinger-Westphal Nucleus
Which extrinsic muscle of the eye abducts the eyeball?
Lateral Rectus
Which cranial nerve supplies parasympathetic innervation to the parotid gland?
Glossopharyngeal N (CN IX) GVM
Identify the components of the nasal septum.
Septal cartilage
Perpendicular plate of ethmoid bone
Vomer