Chapter 12 Appendicular muscles Upper limb muscles to

Chapter 12 Appendicular muscles

Upper limb muscles to know and identify • Shoulder: Deltoid • Upper arm (brachium): Biceps brachii, Triceps brachii, Brachialis, Brachioradialis

Upper arm

Lower limb muscles to know and identify • Upper leg: Sartorius, Tensor fasciae latae, Adductor longus, Adductor magnus, Pectinius, Gracilis, Rectus femoris, Vastus lateralis, Vastus medialis, Biceps femoris, Semitendinosus, Semimembranosis. • Lower leg and calf: Tibialis anterior, Peroneus longus, Gastrocnemius, Soleus

Quadriceps femoris group • • Rectus femoris Vastus medialis Vastus lateralis Vastus intermedius

Hamstring muscle group • Biceps femoris • Semimembranosis • Semitendonosis

Appendicular muscles to know origin and insertion • Biceps brachii - Rectus femoris • Triceps brachii - Biceps femoris • Sartorius - Deltoid - Gastrocnemeus

Biceps brachii • Origin: SH coracoid process; LH supraglenoid tubercle • Insertion: Radial tuberosity • Action: flex elbow and shoulder

Triceps brachii • Origin: Lat H: Sup, lateral margin of humerus; LH: Infraglenoid tubercle; Med H: Post humerus • Insertion: Olecranon of ulna • Action: Extension at elbow

Deltoid • Origin: Clavicle, scapula acromion and spine • Insertion: Deltoid tuberosity of humerus • Action: Abducts shoulder; flexion and rotation of humerus; extension and lateral rotation of humerus

Rectus femoris (Quads) • Origin: Ant iliac spine and sup. margin acetabulum • Insertion: Patella and tibial tuberosity • Action: Extension of leg at knee; flex thigh at hip

Sartorius • Origin: Ant, superior spine of ilium • Insertion: Medial aspect tibial tuberosity • Action: Flexes, abducts and laterally rotates thigh at hip; flexes knee

Biceps femoris (Hamstrings) • Origin: LH: ischial tuberosity; SH: linea aspera of femur • Insertion: Head of fibula • Action: Flexes knee; extends hip; laterally rotates leg

Gastrocnemius • Origin: Lateral condyle and popliteal surface of femur • Insertion: Calcaneus via achilles tendon • Action: Flexes knee and plantar flexion of foot

Structures to know and identify • • • Tendons Galea aponeurosis Linea alba Iliotibial tract Calcaneal “achiles” tendon