Actions Flashcards
What is the action of rectus abdominus
Flex the trunk
Compress the abdomen
Stabilize the pelvis
What is the action of transversus abdominus
Uni: ipsilateral rotation
Bi: compress the abdomen
What is the action of external oblique
Uni: ipsilateral lateral flexion, contralateral rotation
Bi: flex the trunk, compress the abdomen, stabilize the pelvis
What is the action of the internal oblique
Uni: ipsilateral lateral flexion, contralateral rotation
Bi: flex the trunk, compress the abdomen, stabilize the pelvis
What is the action of diaphragm
Respiration
What is the action of psoas major
Hip joint: flexion and external rotation
Lumbar spine: return spine to upright position
What is the action of psoas minor
Weak flexor of the trunk
What is the action of ilacus
Works with psoas major
Flexes thigh, stabilizes hip joint
What is the action of quadratus lumborum
Uni: ipsilateral lateral flexion
Bi: stabilizes 12th rib
What is the action of intercostals
External: inspiration (raises ribs)
Internal and innermost: expiration (lowers ribs)
What is the action of transversus thoracis
Weakly lowers ribs ( expiration)
What is the action of diaphragm hiatus and crura
Respiration
What is the action of levator ani
Support pelvic viscera
What is the action of coccygeus
Support pelvic viscera
Flex coccyx
What is the action of piriformis
External rotation
ABduction
Stabilizes flexed hip
What is the action of Obturator internus
External rotation
ABduction of flexed hip
What is the action of ishiocavernosus
Maintains an erection by squeezing blood into clitoris or penis corpus caverunosum
What is the action of bulbospongiosus
Females: compress vestibular gland
Male: maintain erection
What is the action of superficial transverse perineal
Helps pelvic organs
Closes urethra
What is the action of external anal spinchter
Closes anus
What is the action of omohyoid, sternohyoid,sternothyroid
Depresses the hyoid and larynx for phonation and swallowing
What is the action of thyrohyoid
Depress hyoid, elevate larynx for swallowing
What is the action of masseter
Elevates and protrudes mandible
What is the action of temporalis
Elevates, retracts, laterally deviates mandible
What is the action of lateral pterygoid
Bi laterally: protrudes mandible
Unilateral: lateral deviation
What is the action of medial pterygoid
Elevates mandible
Works with lateral pterygoid for ipsilateral lateral deviation
What is the action of platysma
Forced depression of mandible
Tenses skin on neck
What is the action of digastric
Elevates the mandible for swallowing
What is the action of Stylohyoid
Elevates the mandible for swallowing
What is the action of mylohyoid
Depress the mandible
Draws hyoid forward for swallowing
Lateral deviation for chewing
What is the action of geniohyoid
Depress mandible
Draws hyoid forward for swallowing
