muscles Flashcards
Function and attachment of buccinator
attachments- from alveolar processes of the maxilla & mandible, pterygoid hamulus & pterygomandibular raphe to the buccal angle function- compresses cheek
Innervation of buccinator
facial n.
Blood supply of buccinator
facial & buccal a.
Function and attachment of depressor anguli oris
attachments- from mandible to buccal angle function- depresses buccal angle laterally
Innervation of depressor anguli oris
facial n
Blood supply of depressor anguli oris
inferior labial & mental a.
Function and attachment of depressor labii inferioris
attachments- from lower oblique line of mandible to skin & mucosa of lower lip function- draws lower lip downward
Innervation of depressor labii inferioris
facial n.
Blood supply of depressor labii inferioris
inferior labial & mental a.
Function and attachment of frontalis
attachments- from the superficial fascia of the eyebrows to the epicranial aponeurosis function- protracts the scalp or elevates eyebrows & nose
Innervation of frontalis
facial n.
Blood supply of frontalis
superficial temporal, supraorbital & supratrochlear a.
Function and attachment of levator anguli oris
attachments- from canine fossa of maxilla to angle of mouth function- raises angle of mouth
Innervation of levator anguli oris
facial n.
Blood supply of levator anguli oris
facial, superior labial & infraorbital a.
Function and attachment of levator labii superioris
attachments- from the infraorbital orbital margin to the lateral aspect of the upper lip function- raises & everts upper lip
Innervation of levator labii superioris
facial n.
Blood supply of levator labii superioris
facial, angular & infraorbital a.
Function and attachment of mentalis
attachments- from incisive fossa of mandible to skin of chin function- raises lower lip
Innervation of mentalis
facial n.
Blood supply of mentalis
inferior labial & mental a.
Function and attachment of nasalis
attachments- from the maxilla lateral & inferior to the nasal notch to the bridge & ala of the nose function- transverse fibers compress & alar fibers widen the nasal aperature
Innervation of nasalis
facial n. (buccal branch)
Blood supply of nasalis
lateral nasal, angular & infraorbital a.
Function and attachment of orbicularis oculi
attachments- from orbital margin & medial palpebral lig. to superficial fascia of the eyelid function- palpebral sphinchter
Innervation of orbicularis oculi
temporal & zygomatic branches of the facial n.
Blood supply of orbicularis oculi
superficial temporal, lacrimal, supraorbital, supratrochlear, dorsal nasal,
Function and attachment of orbicularis oris
attachments- from the angle of the mouth to the superficial fascia of the upper lip. function- oral sphinchter
Innervation of orbicularis oris
facial n.
Blood supply of orbicularis oris
facial, inferior & superior labial, infraorbital & mental a.
Function and attachment of platysma (G. platys, flat, broad)
attachments- from the lower border of the mandible to the superficial fascia of the skin of the neck overlying the clavicle function- wrinkles the anterior nuccal skin
Innervation of platysma (G. platys, flat, broad)
facial n.
Blood supply of platysma (G. platys, flat, broad)
facial, submental & suprascapular a.
Function and attachment of zygomaticus major [G. zygon, yoke, a joining or pair]
attachments- from zygomatic bone to angle of the mouth function- raises the buccal angle
Innervation of zygomaticus major [G. zygon, yoke, a joining or pair]
facial n.
Blood supply of zygomaticus major [G. zygon, yoke, a joining or pair]
facial, superior labial, transverse facial & infraorbital a.
Function and attachment of inferior oblique
attachments- from the maxilla lateral to the nasolacrimal groove to the inferolateral, posterior aspect of the sclera function- elevation, abduction and extorsion of the eye
Innervation of inferior oblique
inferior ramus of the oculomotor n.
Blood supply of inferior oblique
ophthalmic & infraorbital a.
Function and attachment of inferior rectus (L. straight)
attachments- from the common tendinous ring to the inferior aspect of the sclera. function- depression, adduction & extorsion of eye
Innervation of inferior rectus (L. straight)
inferior ramus of the oculomotor n.
Blood supply of inferior rectus (L. straight)
ophthalmic & infraorbital a.
Function and attachment of lateral rectus
attachments- from the common tendinous ring to the lateral aspect of the sclera. function- abduction of the eye
Innervation of lateral rectus
abducens n.
Blood supply of lateral rectus
ophthalmic & lacrimal a.
Function and attachment of levator palpebrae superioris
attachments- from the inferior aspect of the lesser wing of the sphenoid to the tarsus and skin of the upper lid. function- elevation of the upper lid
Innervation of levator palpebrae superioris
superior ramus of the oculomotor n.
Blood supply of levator palpebrae superioris
ophthalmic & supraorbital a.
Function and attachment of medial rectus
attachments- from the common tendinous ring to the medial aspect of the sclera, function- adduction of the eye
Innervation of medial rectus
inferior ramus of the oculomotor n.
Blood supply of medial rectus
ophthalmic, anterior ethmoidal & posterior ethmoidal a.
Function and attachment of superior oblique
attachments- from the superomedial, posterior aspect of the orbit (body of sphenoid) to the superolateral, posterior aspect of the sclera passing around the trochlea (superomedial, anterior aspect of the orbit), function- abduction, depression & intorsion of the eye
Innervation of superior oblique
trochlear n.
Blood supply of superior oblique
ophthalmic, uspraorbital, anterior ethmoidal & posterior ethmoidal a.
Function and attachment of superior rectus
attachments- from the common tendinous ring to the superior aspect of the sclera, function- elevation, adduction & intorsion of the eye
Innervation of superior rectus
superior ramus of the oculomotor n.
Blood supply of superior rectus
ophthalmic & supraorbital a.
Function and attachment of masseter
attachments- from the zygomatic arch to the angle of the mandible & lateral aspect of the ramus, function- elevation, protraction and retraction (deep fibers) the mandible
Innervation of masseter
mandibular nerve
Blood supply of masseter
masseteric, facial & transverse facial a.
Function and attachment of temporalis
attachments- from the temporal fossa to the coronoid process & anterior border (temporal crest) of the ramus of the mandible, function- elevation & retraction (posterior aspect of the muscle) of the mandible
Innervation of temporalis
mandibular n.
Blood supply of temporalis
deep temporal a.
Function and attachment of lateral pterygoid
attachments- from the infratemporal surface of the sphenoid & lateral surface of the lateral pterygoid plate to the pterygoid fovea of the mandible & the TMJ disc function- protraction of the mandible & acts with the ipsilateral medial pterygoid to rotate the mandible to produce the side-to-side movements during trituration of food
Innervation of lateral pterygoid
mandibular n.
Blood supply of lateral pterygoid
pterygoid & ascending palatine a.
Function and attachment of medial pterygoid
attachments- from the medial surface of the lateral pterygoid plate & adjacent pterygoid fossa to the medial aspect of the angle of the mandible function- elevation of the mandible & acts with the ipsilateral lateral pterygoid to rotate the mandible to produce the side-to-side movements during trituration of food
Innervation of medial pterygoid
mandibular n.
Blood supply of medial pterygoid
pterygoid a.
Function and attachment of anterior digastric
attachments- from the digastric fossa of the mandible to the intermediate tendon (greater cornu of hyoid), function- depression of the mandible or elevation of the hyoid
Innervation of anterior digastric
mylohyoid branch of the inferior alveolar n.
Blood supply of anterior digastric
submental branch of facial a.
Function and attachment of posterior digastric
attachments- from the temporal mastoid notch to the intermediate tendon (greater cornu of hyoid), function- depression of the mandible or elevation of the hyoid
Innervation of posterior digastric
facial n.
Blood supply of posterior digastric
occipital & posterior auricular a.
Function and attachment of geniohyoid
attachments- from the inferior genial tubercle of the mandible to the anterior aspect of the body of the hyoid, function- elevation & anterior displacement of the hyoid, or depression of the mandible with a fixed hyoid
Innervation of geniohyoid
ventral ramus of C1 (via the hypoglossal n.)
Blood supply of geniohyoid
sublingual a.
Function and attachment of longus capitis
attachments- from the anterior tubercles of the transverse processes of cervical vertebrae to the basilar occipital bone, function- flexion of the head & neck
Innervation of longus capitis
ventral rami of cervical spinal n.
Blood supply of longus capitis
vertebral, ascending cervical, ascending pharyngeal & inferior thyroid a.
Function and attachment of longus colli (L. neck)
attachments- from cervical vertebral bodies to cervical vertebral bodies & transverse processes, function- flexion of the neck
Innervation of longus colli (L. neck)
ventral rami of cervical spinal n.