Frog muscles: origin, insertion, function Flashcards
Pectoralis
Origin: sternum, anterior coracoid, and fascia of rectus abdominis
Insertion: humerus
Function: adducts, rotates, and flexex forelimb
Rectus abdominis
Origin: public border
Insertion: dorsal surface of episternum
Function: flexes trunk
Latissimus dorsi
Origin: dorsal conenctive tissue
Insertion: humerus
Function: retracts forelimb
Dorsalis scapulae
Origin: suprascapula
Insertion: humerus
Function: protracts forelimb
Rhomboideus
Origin: dorsal midline
Insertion: ventral surface of suprascapula
Function: stabilizes suprascapulae
Longissimus dorsi
Origin: urostyle
Insertion: posterior portion of skull and anterior vertebrae
Function: extends pelvic area
Depressor mandibulae
Origin: squamosal
Insertion: posterior portion of angulosplenial
Function: depresses mandible
Temporalis
Origin: frontoparietal
Insertion: coronoid process
Function: elevates mandible
Masseter
Origin: frontoparietal
Insertion: coronoid process
Function elevates mandible
Intermandibularis
Origin: mandible
Insertion: median raphe
Function: elevates the throat
Interhyoideus
Origin: fascia of drepressor mandibulae
Insertion: median raphe
Function: elevates throat
Geniohyoideus
Origin: mandibular symphysis
Insertion: hyoid
Function: depresses mandible and pulls hyoid apparatus anteriorly
Sternohyoideus
Origin: sternum
Insertion: hyoid
Function: retracts hyoid
Deltoideus
Origin: sternum, clavicle, scapula
Insertion: proximal portion of humerus
Function: protraction and adduction of forearm
Triceps brachii
Origin: two heads from humerus and one from scapula
Insertion: ulna
Function: extends forearm
Flexors and extensors
flexors located on the ventral surface of the forearm while the extemsors are located on the dorsal surface of the forearm, both interact with the forelimb
Iliacus externus
Origin: ilium
Insertion: proximal end of femur
Function: protract and rotate the hindlimb
Triceps femoris
Origin: ilium and acetabulum
Insertion: proximal end of tibiofibula
Function: extends lower limb and assists in protraction of thigh
Iliofibularis
Origin: pelivc girdle
Insertion: proximal end of tibiofibula
Function: flexes lower hindlimb and assists in retraction and abduction of thigh
Sartorius
Origin: pelvic girdle
Insertion: proximal end of tibiofibula
Function: flexes lower hindlimb, adducts and protracts thigh
Adductor Magnus
Origin: pelvic girdle
Insertion: distal one third of femur
Function: adducts thigh
Adductor longus
Origin: pelvic girdle
Insertion: distal end of femur
Function: adducts thigh
Pectineus
Origin: pelvic girdle
Insertion proximal end of femur
Function: adducts thigh
Gracilis major and minor
Origin: pelvis
Insertion: proximal end of tibiofibula
Function: flexes lower limb and retracts and adducts thigh
Semimembranosus
Origin: pelvic girdle
Insertion: proximal end of tibiofibula
Function: extends lower hindlimb and assists in retraction and adduction of thigh
Semitendinosus
Origin: pelvic girdle
Insertion: proximal end of tibiofibual
Function: flexes lower hindlimb and retracts thigh
Gastrocnemius
Origin: distal end of femur
Insertion: plantar aponeurosis by the way of the achilles tendon
Function: extends foot and flexes toes
Peroneus
Origin: distal end of femur
Insertion: proximal tarsals
Action: flexes foot
