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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 |