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MUSCLES 1/31/12

ORIGIN & INSERTION

QuestionAnswer
SERRATUS POSTERIOR INFERIOR ACTION: DEEP BACK MUSCLES, KEEP YOU UPRIGHT & Balanced even while sitting. ORIGIN: vertebrae T11-L3 INSERTION: Inferior borders of the 9th-12th rib.
RHOMBOID MAJOR ACTION: Inferior to trapezius Origin: spinous processes of the t2 to T5 vertebrae INSERTION: Medial border of the scapula, inferior to the insertion of rhomboid minor muscle
TRICEPS BRACHII ACTION: extend forearm, assist adduction of arm ORIGIN: long head-infraglenoid tubercle, lat & med heads-posterior shaft of humerous INSERTION: olecranon process of ulna
ABDUCTOR POLLICIS BREVIS ACTION: Helps hitchhike ORIGIN: Transverse carpal ligament, the scaphoid & trapezium INSERTION: Radial base of proximal phalanx of thumb & thumb extensors
ABDUCTOR DIGITI MINIMI ACTION: Abducts little finger Deepest, most lateral muscle ORIGIN: pisiform INSERTION: Base of the proximal phalanx of the 5th digit on the ulnar or medial side
RECTUS FEMORIS ACTION: Extend knee, flex thigh ORIGIN: Anterior inferior iliac spine, superior margin of acetabulum, greater trochanter, shaft of femur INSERTION: Patella & tibial tuberosity via patellar tendon
GRACILIS ACTION: Adducts & flexes thigh * Innermost thigh ORIGIN: Ischiopubic INSERTION: Tibia
GLUTEUS MAXIMUS ORIGIN: Ilium INSERTION: Femur
GLUTEUS MEDIUS ORIGIN: Ilium INSERTION: Greater trochanter of femur
GLUTEUS MINIMUS ORIGIN: Ilium INSERTION: Greater trochanter of femur
ILIOPSOAS ACTION: Flexion of hip ORIGIN: Iliac fossa, spine INSERTION: Lesser trochanter of femur
VASTUS LATERALIS ACTION: Extends lower leg ORIGIN: Greater trochanter, intertrochanteric line, & linea aspera of the femur INSERTION: Patella via the quadriceps tendon & tibial tuberosity via the patellar ligament
VASTUS INTERMEDIAS ACTION: Extends leg * underneath the rectus femoris ORIGIN: lateral femur INSERTION: patellar ligament
SARTORIUS "SEATBELT" ACTION: Flexes thigh & rotates thigh laterally ORIGIN: Superior to the anterior superior iliac spine INSERTION: anteromedial surface of the upper tibia
TIBIALIS ANTERIOR ACTION: Dorsiflexion ORIGIN: superior to the anterior superior iliac spine INSERTION: anteromedial surface of the upper tibia
FIBULARIS LONGUS ACTION: Plantarflex eversion ORIGIN: lateral fibula INSERTION: 5th metatarsal, tarsal
GASTROCNEMIUS ACTION: Plantar flexion, flex knee ORIGIN: superior to articular surfaces of lateral condyle of femur & medial condyle of femur INSERTION: (achilles tendon)into mid-posterior calcaneus
SOLEUS Behind & to the sides of the gastrocnemius; partially covered by the tendon Important for standing "peripheral heart" ORIGIN: Fibula, medial border of tibia INSERTION: Tendon calcaneus
PLANTARIS ACTION: plantarflex foot, weak knee flexion ORIGIN: posterior femur INSERTION: posterior calcaneus via tendon
TERES MINOR ACTION: Extend, Adduct, Laterally rotate ORIGIN: Scapula INSERTION: Humerus
BICEPS BRACHII ACTION: Flex elbow, supinate forearm, weak arm flexor ORIGIN: Short head-coracoid process, long head-tubercle above glenoid cavity and lip of glenoid cavity INSERTION: radial tuberosity
Created by: A_K_KING
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