Unit 2 Flashcards
study the skull fa real and read about sinuses in dissection guide
x
what is the forelock
cranial extension of the mane
what are the horn glands
sebaceous glands located caudomedial to the base of the horn bud
infraorbital sinus
cutaneous pouch rostral to edial canthus of the eye and may be filled with fatty secretions
cutaneous faciei muscle extends from
laryngeal region to the commissure of the mouth
parotidoauricularis muscle attachments
fascia on the ventral part of the parotid salivary gland to the auricular cartilage of the ear
what is the function of the parotidoauricularis muscle
draws the ear ventrally and caudally; involved in laying back the ears
orbicularis oculi muscle attachments
medial palpebral ligament to upper and lower eyelids
what is the function of the orbicularis oculi
acts as a sphincter to close the palpebral fissure
orbicularis oculi is innervated by
auriculopalpebral nerve
orbicularis oris muscle i located
within the stroma of the lips
what is the function of the orbicularis oris
acts as a sphincter to close the lips
what are the attachments of the zygomaticus m.
from the fascia covering the masster muscle to the commissure of the lips and blends with the buccinator muscle
what is the function of the zygomaticus
retracts and elevates the angle of the mouth
what are the attachments of the nasolabialis in the horse
form the frontal and nasal bones and then divides into 2 braches; dorsal branch goes to upper lip and lateral wing of the nostril; ventral branch courses to the commissure of the lips;
what is the function of the levator nasolabialis muscle
upper lip and commissure and dilates the nostril
what are the attachments of the levator nasolabialis muscle in ruminants
from the rostral part of the frontal bone and the frontalis msucle (in ox divides into superficial and deep portions that course to nostril and superior lip and to lateral nasal cartilages, incisive bone, and lateral part of the nostril)
what is the function of the levator nasolabialis muscle ni ruminants
elevates the upper lip and commissure and dilates the nostril;
in ox, what courses between the two branches of levator nasolabialis
the caninus muscle
levator labii superioris muscle attachments in horse
junction of the lacrimal, zygomatic, and maxillary bones; upper lip
what is the function of the levator labii superioris muscle
elevates the upper lip
what are the attachments of the levator labii superioris muscle in rumants
facial tuberosity and inserts on the muzzle by way of several tendons
what are the attachments of the dilator nares apicalis muscle in the horse
between alar cartilages of the nostril
what is the function of the dilator nares apicalis muscle
dilates the nostrils
what are the attachments of the caninus muscle in horses
between the two portions of the levator nasolabialis and inserts on the lateral wing of the nostril
what is the function of the caninus muscle
dilates the nostril
what are the attachments of the caninus muscle in ruminants
the facial tuberosity and inserts on the lateral portion of the nostril
what are the attachments of the depressor labii inferioris in the ruminant
maxilla and facial tuberosity to the upper lip and ventral portion of nostril
what is the function of the depressor labii inferioris m.
retracts the rostral portion of the upper lip and ventrolateral portion of the nostril
what are the attachments of the depressor labii inferioris muscle
alveolar border of the mandible and inserts on the upper lip
what is the function of the depressor labii inferioris muscle
depresses and retracts the lower lip
what are the attachments of the rostral malaris muscle in the ruminant
facial part of the lacrimal bone and inserts on the buccal fascia dorsal to the buccinator muscle
what is the function of the rostral malaris muscle
raises the caudal part of the cheek
what are the attachments of the caudal part of the malarais muscle
the masseteric fascia and inserts on the lower eyelid
what is the function of the caudal part of the malaris muscle
to depress the lower eyelid and widen the palpebral fissure
what is the main muscle of the cheek
buccinator muscle
what are the attachments of the buccinator muscle
from the alveolar bone of the mandible to the angle of the mouth
what is the function of the buccinator muscle
flattens the cheek, pressing the food between the teeth; retracts the angle of the mouth
in ruminants, what are the attachments of the frontalis muscle
from the base of the horn and intercornual protuberance to the upper eyelid and frontal region
what is the function of the frontalis
elevates the superior palpebra and medial angle of the eye
what passes through the ethmoid foramen
vessles and nerves pass through this foramen
what passes through the stylomastoid foramen
the facial nerve
what passes through the tympano-occipital fissure in ruminants
cranial nerves IX, X, XI
What passes through the optic canal
optic nerve
what passes through the orbital fissure
oculomotor, trochlear, ophthalmic, and abducens nerves
what passes through the rostral alar canal
the maxillary artery
what passes through the foramen lacerum in the horse
cranial nerves IX, X, XI
In the equine skull, the oval foramen is replaced with the _______
oval notch
what courses through the oval notch in the horse
the mandibular division of the trigeminal nerve
what passes through the carotid notch
the internal carotid artery
in ruminants, what passes through the foramen orbitorotundum
oculomotor, trochleaer, ophthalmic, and maxillary division of trigeminal nerve and abducens nerve
