chapter 12 appendicular muscles. upper limb muscles to know and identify shoulder: deltoid...
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Upper armTRANSCRIPT
Chapter 12
Appendicular muscles
Upper limb muscles to know and identify
• Shoulder: Deltoid (sometimes referred as axial muscle).
• Upper arm (brachium): Biceps brachii, Triceps brachii, Brachialis, Brachioradialis
Upper arm
Forearm muscles
Lower limb muscles to know and identify
• Upper leg: Sartorius, Tensor fasciae latae, Adductor longus, Adductor magnus, Gracilis, Rectus femoris, Vastus lateralis, Vastus medialis, Biceps femoris, Semitendinosus, Semimembranosis.
• Lower leg and calf: Tibialis anterior, Gastrocnemius, Soleus
Quadriceps femoris group
• Rectus femoris• Vastus medialis• Vastus lateralis• Vastus intermedius
Hamstring muscle group
• Biceps femoris• Semimembranosis• Semitendonosis
Muscles of lower leg
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