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Muscle Functions
Muscles and Muscle Functions of the Upper and Lower Extremities
| Question | Answer |
|---|---|
| Rhomboids | Retraction of Scapula, holds Scapula in place |
| Levator Scapulae | Elevation of Scapula (and shoulder) and holds Scapula in place |
| Serratus Anterior | Protraction and upward rotation os Scapula |
| Pectoralis Minor | Pushes clavicle back and holds it in place |
| Supraspinatus | Lateral rotation of the shoulder |
| Infraspinatus | Lateral rotation of the shoulder |
| Teres Minor | Lateral rotation of the shoulder |
| Subscapularis | Anterior of scapula, causes medial rotation of the shoulder |
| Deltoid | Flexs, Extends and Abducts the shoulder |
| Pectoralis Major | Flexs shoulder |
| Latissimus Dorsi | Slight shoulder rotator and major shoulder extensor |
| Teres Major | Medial rotator of the shoulder |
| Coracobrachialis | Aids slightly in adduction and flexion of the shoulder |
| Biceps Brachii | Aids in flexion of the shoulder and is the major flexor of the elbow, also aids in elbow supination |
| Triceps Brachii | Long head aids in adduction of the shoulder, major elbow extensor |
| Brachialis | Elbow flexor and supination |
| Brachioradialis | Aids in flexion of the elbow and rapid extension when countering centrifigal forces |
| Pronator Teres | Aids in elbow flexion and elbow pronation |
| Anconeus | The anconeus is an elbow extensor |
| Supinator | Allows for supination of the forearm |
| Pronator Quadratus | Main pronator of the elbow |
| Flexor Digitorum Profundus | Wrist flexor |
| Flexor Digitorum Longus | Wrist flexor |
| Flexor Digitorum Superficialis | Wrist flexor |
| Flexor Carpi Ulnaris | Wrist flexor |
| Palmaris Longus | Wrist flexor |
| Flexor Carpi Radialis | Wrist flexor |
| Extensor Indicis | Wrist extensor |
| Gluteus Maximus | Part of the gluteal group, rotates and extends hip |
| Gluteus Medius | Part of the gluteal group, allow adduction of the hip |
| Gluteus Minimus | Part of the gluteal group, allows adduction of the hip |
| Tensor Fasciae Lata | Part of the gluteal group, allows adduction of the hip |
| Piriformis | Part of the gluteal group, allows external rotation of hip |
| Obturator Internus | Part of the gluteal group, allows external rotation of hip |
| Obterator Externus | Part of the gluteal group, allows external rotation of hip |
| Quadratus Femoris | Part of the gluteal group, allows external rotation of hip |
| Gemellus Superior | Part of the gluteal group, allows external rotation of hip |
| Gemellus Inferior | Part of the gluteal group, allows external rotation of hip |
| Semimembranosus | One of three hamstring muscles, acts as an extendor of the hip joint and flexor of the knee joint |
| Semitendinosus | Part of the hamstring group, extensor of the hip joint and flexor of the knee joint |
| Biceps Femoris | Part of the hamstring group, Extensor of the hip and flexor of the knee |
| Pectineus | Adductor of the hip |
| Adductor Brevis | Adductor of the hip |
| Adductor Longus | Adductor of the hip |
| Adductor Magnus | Adductor of the hip |
| Gracilis | Adductor of the hip and weak knee flexor |
| Obturator Externus | Adductor of the hip |
| Sartorius | Flexor of the hip joint and flexor of the knee joint |
| Rectus Femoris | Part of the 'Quads' group. Flexor of the hip joint and Extensor of the knee joint |
| Vastus Group (Lateralis, Intermedius, Medialis) | Part of the group of 'quads'. Extensor of the knee. |
| Iliopsoas | Most powerful flexor of the hip |
| Tibialis Anterior | Allows dorsiflexion and inversion of the foot |
| Extensor Digitorum Longus | Allows dorsiflexion |
| Extensor Hallucis Longus | Allows dorsiflexion |
| Fibularis Tertius | Allows dorsiflexion |
| Fibularis Longus | Allows plantar flexion and eversion of the foot |
| Fibularis Brevus | Allows plantar flexion and eversion of the foot |
| Tibialis Posterior | Allows plantarflexion |
| Flexor Digitorum Longus | Allows plantarflexion |
| Flexor Hallucis Longus | Allows plantarflexion |
| Popliteus | Rotates the tibia medially, aids in knee flexion |
| Plantaris | Acts as a knee flexor |
| Soleus | Acts as a knee flexor |