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22 Cards in this Set
- Front
- Back
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Masseter
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O: Superficial: Inferior & medial surfaces of anterior half of zygomatic arch
Deep: Posterior 3/4 of zygomatic arch and temporomandibular joint capsule I: Superficial: Inferior half of lateral surrace of ramus and angle of mandible N: V3; mandibular division of trigeminal nerve A: Elevates mandible and clinches incisors, also opposes molars, closing the jaw |
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Temporalis
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O: Temporal fossa and some fibers of inner surface of zygomatic arch
I: By heavy tendon to process at base of coronoid process and fleshily on the anterior inner surface of ramus. Also by strong, broad tendon to coronoid process and mandibular notch N: V3; mandibular division of Trigeminal A: Opposition of molars, elevates mandible, retracts mandible CA: I-Humans: Anterior border of ramus and entire border of coronoid process A-Humans: Similar to monkeys, but weaker O-Apes: From as high as the sagittal crest down through to temporal fossa |
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Medial Pterygoid
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O: Medial surface of lateral pterygoid plate
I: Angle and posterior position of ramus of mandible N: V3; trigeminal nerve A: Protracts mandible and grinds teeth when 2 medial pterygoids alternate |
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Lateral Pterygoid
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O: Upper Head: Outer surface of greater wing of sphenoid
Lower Head: Lateral surface of lateral pterygoid plate I: Inner surface of mandibular neck N: V3; trigeminal nerve A: Protracts mandible |
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Sternomastoid
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O: Tip of manubrium
I: Mastoid process just below the external auditory meatus N: Branch of ventral ramus C2 and branch of accessorius A: Unilaterally: Rotates head Bilaterally: nods head |
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Cleidomastoid
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O: From the extreme medial portion of clavicle
I: Mastoid process deep to sternomastoid N: Branches of C2 and accessorius A: Unilaterally: rotates head Bilaterally: nods head CA: Sternomastoid and cleidomastoid are Sternocleidomastoid in humans |
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Scalenus Brevis Anterior
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O: Transverse processes C3-C5 and ventral lamina C6
I: Ventrolateral aspect of first rib N: Ventral rami of cervical nerves A: Lateral flexor (abductor) of neck, also elevates ribs when neck is fixed aiding in forced respiration |
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Scalenus Longus
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O: Transverse process of C4
I: cranio-lateral border of the 3rd-5th ribs N: Ventral rami of cervical nerves and branches of the upper intercostal nerves A: Lateral flexor (abductor) of neck, also elevates ribs when neck is fixed aiding in forced respiration |
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Scalenus Brevis Posterior
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O: Transverse processes of C1-C7
I: Dorsolateral aspect of the cranial border of the first rib N: Ventral rami of the cervical nerves A: Lateral flexor (Abductor) of neck, also elevates ribs when neck is fixed aiding in forced respiration |
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Scalenus Anterior
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Humans
O: Transverse processes of C3-C6 I: Scalene tubercle of first rib A: Elevates first rib and flexes and rotates vertebral column |
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Scalenus Medius
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O: Transverse processes of C1-C7
I: Upper border of first rib A: Elevates first rib and flexes and rotates vertebral column |
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Scalenus Posterior
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Humans
O: Transverse processes of C4-C6 I: Outer border of second rib A: Elevates second rib and flexes vertebral column CA: Not equivalent in monkeys |
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Suprahyoid Group
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Digastric
Stylohyoid Mylohyoid Geniohyoid |
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Infrahyoid Group
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Omohyoid
Sternohyoid Sternothyroid Thyrohyoid |
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Digastric
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O: Mastoid head: Mastoid process (analogous to posterior head)
Mandibular head: Digastric fossa of mandible (analogous to anterior head) I: By smooth tendon connecting two heads to hyoid N: Mastoid head: facial Mandibular head: V3; trigeminal A: Elevates hyoid bone when mandible is fixed and depresses mandible when hyoid is fixed CA: Humans: anterior bellies are separate, while in monkeys & apes bellies fuse and form a single tendinous arch known as the digastric sling |
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Stylohyoid
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O: By tendon from styloid process
I: Hyoid bone N: Facial A: Elevates hyoid in swallowing, and fixes hyoid to depress mandible |
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Mylohyoid
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O: Inner surface of the body of the mandible (mylohyoid line)
I: Hyoid bone and suprahyoid raphe N: V3; Trigeminal A: Elevates hyoid bone in swalowing, depresses mandible and raises floor of mouth |
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Geniohyoid
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Lies deep to mylohyoid
O: inner surface of mandibular symphysis (genial tubercle) I: Posterior portion of suprahyoid raphe N: Hypoglossus A: Protracts and raises the hyoid CA: I-Humans: Body of hyoid N-Humans: Ansa hypoglossi |
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Omohyoid
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O: Middle of cranial border of scapula
I: Hyoid bone N: Ansa hypoglossi A: Depresses hyoid bone |
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Sternohyoid
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O: Craniofacial border of manubrium
I: Hyoid bone N: Ansa hypoglossi A: Depresses hyoid bone |
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Sternothyroid
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O: Manubrium deep to sternohyoid
I: Caudolateral border of the thyroid cartilage N: Ansa hypoglossi A: Depresses thyroid |
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Thyrohyoid
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O: Inferior border of the thyroid cartilage
I: Lateral part of hyoid bone N: Hypoglossus A: Depresses hyoid bone |
