PTA 101 - Major Muscles - Origin, Insertion, Action, and Nerve
Adductor Brevis Origin (O) Insertion (I) Action (A) Nerve (N)
Adductor Brevis O: Pubis I: Pectineal line and proximal linea aspera A: Hip Adduction N: Obturator nerve (L3, L4) Source: PTA 101 Kinesiology book
Adductor Longus Origin (O) Insertion (I) Action (A) Nerve (N)
Adductor Longus O: Pubis I: Middle 1/3 Linea aspera A: Hip Adduction N: Obturator nerve (L3, L4) Source: PTA 101 Kinesiology book
Adductor Magnus Origin (O) Insertion (I) Action (A) Nerve (N)
Adductor Magnus O: Ischium and pubis I: Entire linea aspera and adductor tubercle A: Hip Adduction N: Obturator nerve and sciatic (L3, L4) Source: PTA 101 Kinesiology book
Biceps Brachii - Short Head Origin (O) Insertion (I) Action (A) Nerve (N)
Biceps Brachii - Short Head O: Coracoid process I: Radial tuberosity of radius A: Elbow Flexion (Source: PTA Lab book) N: Musculocutaneous Nerve (C5, C6) Source: PTA 101 Kinesiology book
Biceps Brachii - Long Head Origin (O) Insertion (I) Action (A) Nerve (N)
Biceps Brachii Long Head O: Supraglenoid tubercle I: Radial tuberosity of radius A: Elbow Flexion (Source: PTA Lab book) N: Musculocutaneous Nerve (C5, C6) Source: PTA 101 Kinesiology book
Biceps Femoris (Hamstring) Origin (O) Insertion (I) Action (A) Nerve (N)
Biceps Femoris (Hamstring) O: Long head- Ischial tuberosity O: Short head- Lateral lip of linea aspera I: Fibular head A: Long head - Extend hip and flex knee A: Short head - Flex head N: Long head - sciatic nerve (S1, S2, S3) N: Short head - Common peroneal nerve (L5,S1,S2) Source: PTA 101 Kinesiology book
Gluteus Maximus Origin (O) Insertion (I) Action (A) Nerve (N)
Glute Maximus O: Posterior sacrum and ilium I: Posterior femurs distal to greater trochanter and iliotibial band A: Hip extension, hyperextension, lateral rotation N: Inferior gluteal nerve (L3, S1, S2) Source: PTA 101 Kinesiology book
Gluteus Medius Origin (O) Insertion (I) Action (A) Nerve (N)
Gluteus Medius O: Outer surface of the ilium I: Lateral surface of the greater trochanter A: Hip Abduction N: Superior gluteal nerve (L4, L5, S1) Source: PTA 101 Kinesiology book
Gluteus Minimus Origin (O) Insertion (I) Action (A) Nerve (N)
Gluteus Minimus O: Lateral ilium I: Anterior surface of the greater trochanter A: Hip abduction, medial rotation N: Superior gluteal nerve (L4, L5, S1) Source: PTA 101 Kinesiology book
Rectus Femoris Origin (O) Insertion (I) Action (A) Nerve (N)
Rectus Femoris O: Anterior inferior iliac spine (AIIS) I: Tibial tuberosity A: Hip flexion, knee extension N: Femoral nerve (L2, L3, L4) Source: PTA 101 Kinesiology book
Semimembranosus (Hamstring) Origin (O) Insertion (I) Action (A) Nerve (N)
Semimembranosus (Hamstring) O: Ischial tuberosity I: Posterior surface of medial condyle of tibia A: Extends hip and flex knee N: Sciatic nerve (L5, S1, S2) Source: PTA 101 Kinesiology book
Semitendinosus Origin (O) Insertion (I) Action (A) Nerve (N)
Semitendinosus (Hamstring) O: Ischial tuberosity I: Anteromedial surface of proximal tibia A: Extends hip and flex knee N: Sciatic nerve (L5, S1, S2) Source: PTA 101 Kinesiology book
Triceps Brachii - Lateral Head Origin (O) Insertion (I) Action (A) Nerve (N)
Triceps Brachii - Lateral Head O: Inferior to greater tubercle on posterior humerus I: Olecranon process of ulna A: Elbow Extension (Source: PTA Lab book) N: Radial Nerve (C7, C8) Source: PTA 101 Kinesiology book
Triceps Brachii - Long head Origin (O) Insertion (I) Action (A) Nerve (N)
Triceps Brachii - Long head O: Infraglenoid tubercle of scapula I: Olecranon process of ulna A: Elbow Extension (Source: PTA Lab book) N: Radial Nerve (C7, C8) Source: PTA 101 Kinesiology book
Triceps Brachii - Medial Head Origin (O) Insertion (I) Action (A) Nerve (N)
Triceps Brachii - Medial head O: Posterior surface of humerus I: Olecranon process of ulna A: Elbow Extension (Source: PTA Lab book) N: Radial Nerve (C7, C8) Source: PTA 101 Kinesiology book
Vastus intermedialis Origin (O) Insertion (I) Action (A) Nerve (N)
Vastus intermedialis O: anterior femur I: tibial tuberosity via patellar tendon A: knee extension N: femoral nerve (L2, L3, L4) Source: PTA 101 Kinesiology book
Vastus lateralis Origin (O) Insertion (I) Action (A) Nerve (N)
Vastus lateralis O: linea aspera I: tibial tuberosity via patellar tendon A: knee extension N: femoral nerve (L2, L3, L4) Source: PTA 101 Kinesiology book
Vastus medialis Origin (O) Insertion (I) Action (A) Nerve (N)
Vastus medialis O: linea aspera I: tibial tuberosity via patellar tendon A: knee extension N: femoral nerve (L2, L3, L4) Source: PTA 101 Kinesiology book