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17 Cards in this Set
- Front
- Back
- 3rd side (hint)
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suprahyoid muscles
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digastric, stylohyoid, mylohyoid, geniohyoid
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d, s, m, g
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infrahyoid muscles
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sternohyoid, sternothyroid, omohyoid, thyrohyoid
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s, s, o, t
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digastric
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O=ant.-lower margin of mandible; post.-mastoid
I=loop of connective tissue to hyoid A=elevate hyoid & steady it during swallowing & speech; acting from behind they open mouth and depress mandible N=ant.-CN V; post.-CN VII |
elevates...steadies...
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stylohyoid
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O=styloid of temoral bone
I=hyoid A=elevates & retracts hyoid; elongates floor of mouth during swallowing N=CN VII |
elongates...
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mylohyoid
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O=medial surface of mandible
I=hyoid & median raphe A=elevates hyoid & floor of mouth enabling tongue to exert backward & upward pressure that forces food bolus in pharynx N=CN V (mandibular branch) |
food bolus
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geniohyoid
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O=inner surface of mandible
I=hyoid A=pulls hyoid superiorly & anteriorly, shortening floor of mouth & widening pharynx for receiving food during swallowing N=C1 via CN XII |
receiving food
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sternohyoid
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O=manubrium & med. end of clavicle
I=lower margin of hyoid A=depresses larynx and hyoid if mandible is fixed; may also flex skull N=C1-C3 |
depresses...fexes...
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sternothyroid
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O=post. surface of manubrium
I=thyroid cartilage A=pulls thyroid cartilage (plus larynx & hyoid) inferiorly N=C1-C3 |
pulls thyroid cartilage...
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omohyoid
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O=sup. surface of scapula
I=lower border of hyoid A=depresses & retracts hyoid N=C1-C3 |
depresses...
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thyrohyoid
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O=thyroid cartilage
I=hyoid A=depresses hyoid & elevates thyroid cartilage N=C1 via CN XII |
depresses hyoid and elevates...
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superior pharyngeal constrictor
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O=ant. to mandible & med. to pterygoid
I=post. median raphe of pharynx A=constricts pharynx during swallowing, which propels food bolus to esophagus N=pharyngeal plexus (CN IX & X) |
during swallowing
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middle pharyngeal constrictor
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O=hyoid
I=post. median raphe of pharynx A=constricts pharynx during swallowing, which propels food bolus to esophagus N=pharyngeal plexus (CN IX & X) |
during swallowing
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inferior pharyngeal constrictor
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O=laryngeal cartilages
I=post. median raphe of pharynx A=constricts pharynx during swallowing, which propels food bolus to esophagus N=pharyngeal plexus (CN IX & X) |
during swallowing
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sternocleidomastoid
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O=manubrium & med. clavicle
I=lat. surface of mastoid process A=prime mover of active head flexion; acting alone, rotates head toward shoulder on opposite side & tilts or lat. flexes to its own side N=CN XI |
moves head and shoulders
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scalenes (ant., middle, and post.)
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O=transverse process of cerv. vertebrae
I=anterolaterally on first 2 ribs A=elevates first two ribs (aid in inspiration); may be important in coughing; flex and rotate neck N=cervical nerves |
inspiration
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splenius capitis
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O=spinous processes of C7-T6
I=mastoid process of temporal bone & occipital bone A=extends & hyperextends head; when muscles on one side are activated, head is rotated and bent laterally toward same side N=cervical spinal nerves (dorsal rami) |
moves head
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splenius cervicis
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O=spinous processes of T3-T6
I=transverse processes of C2-C4 A=extends & hyperextends head; when muscles on one side are activated, head is rotated and bent laterally toward same side N=cervical spinal nerves (dorsal rami) |
moves head
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