Question

In: Anatomy and Physiology

Muscle origin &n

Muscle origin insertion action

zygomaticus	Zygomatic bone
Frontalis	Cranial aponeurosis
Masseter	Zygomatic arch and maxilla
Temporalis	Temporal fossa
Lateral and Media; pterygoid	Greater wing of sphenoid bone
Buccinator
Corrugator Supercilii
Mentalis
Orbicularis oculi
Orbicularis Oris

Expert Solution

1)Buccinator

origin - external alveolar margins of maxilla and mandible by molar teeth, to maxillary tubercle and pterygoid hamulus and posterior mylohyoid line .

Insertion - decusstaes at modiolus of mouth and interdigitates with opposite side.

Action of buccinator - pull back the angle of mouth and flatten the cheek area which aids in holding the cheek while chewing.

2)Corrugator supercilli --

Origin -- Medial superciliary arch.

Insertion -- skin of Medial forehead.

Action -- wrinkles forehead.

3)Menatlis muscle --

Origin -- incisive fossa of.mandible .

Insertion -- skin of chin

Action -- elevates , everts and protudes lower lip.

4) orbicularis oculi --

Origin - frontal surface of orbital margin

Insertion -- lateral palpable raphe on outer part of each eye .

Action -- close the eyelid , helps on passing and draining of tears.

5) Orbicularis Oris --

Origin -- Medial aspect of maxilla and mandible, perioral skin and muscle , modiolus

Insertion -- skin and mucous Membrane of lips

Action -- closes mouth , compresses and protrudes lips.

Sydney Mullin answered 1 year ago

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