Question | Answer | | |
Masseter | O: Maxilla and Zygomatic arch | I: Mandible | A: Elevates mandible (jaw closure) |
Sternocleidomastoid | O: Sternum and Clavicle of temporal bone | I: Mastoid process | A: Stimultaneous contraction flexes neck; acting singly laterally rotates head |
External Oblique | O:Ribs 5-12 | I:Iliac crest and linea alba | A:Acting t/g, flexes vertebral column and compresses abdomen; acting singly laterally flexes vertebral column |
Rectus Abdominis | O:Pubic crest and pubic symphysis cartilages of ribs 5-7 | I:Xiphoid process and costal | A:Flexes vertebral column compresses abdomen |
Trapezius | O:Occipital bone, spine of C7, and all thoracic vertebrae | I:Acromion and spine of scapula and clavicle | A:Stablizes, elevates, retracts, and rotates scapula |
Rhomboideus Major | O:Spinous processes T2-T5 | I:Vertebral (medial) border of scapula | A:Retracts scapula |
Serratus Anterior | O:Ribs 1-8 | I:Vertebral (medial) border of scapula | A:Protracts scapula |
Petorails Major | O:Clavicle, sternum, costal cartilage of ribs 1-6 | I:Greater tubercle and intertubercular groove (sulcus) of humerus | A:Flexes, adducts, and medially rotates arm (shoulder) |
Deltoid | O:Clavicle, acromion, and spine of scapula | I:Deltoid tuberosity of humerus | A:Flexes, adducts, and extends arm (shoulder) |
Latissimus dorsi | O:Spinous processes of T6-L5, sacrum and ilium | I:Intertubercular groove (sulcus) of humerus | A:Adducts, extends, and medially rotates arm (shoulder) |
Supraspinatus | O:Supraspinous fossa of scapula | I:Greater tubercle of humerus | A:Abducts arm (shoulder) |
Infraspinatus | O:Infraspinatus fossa of scapula | I:Greater tubercle of humerus | A:Adducts and laterally rotates arm (shoulder) |
Teres Minor | O:Inferior lateral border of scapula | I:Greater tubercle of humerus | A:Adducts, extends, and laterally rotates arm (shoulder) |
Subscapularis | O:Subscapular fossa of scapula | I:Lesser tubercle of humerus | A:Adduccts, extends, and laterally rotates arm (shoulder) |
Biceps brachii | O:Short Head-coracois process of scapula Long Head-above glenoid cavity | I:Radial tuberosity of radius | A:Flexes and supinates forearm (elbow) |
Triceps brachii | O:Posterior humerus and below glenoid cavity | I:Olecranon process of ulna | A:Extends foreman (elbow) |
Brachialis | O:Distal humerus | I:Coronoid process of ulna | A:Flexes forearm )elbow) |
Brachioradials | O:Distal humerus | I:Styloid process of radius | A:Flexes forearm (elbow) |
Flexor carpi radialis | O:Medial epicondyle of humerus | I:2nd and 3rd metacarpals | A:Flexes wrist, abducts hand (radial deviation) |
Flexor carpi ulnaris | O:Medial epicondyle of humerus and olecranon process | I:5th metacarpal and lateral carpal bones | A:Flexes wrist, adducts hand (ulnar deviation) |
Flexor digitorum profundus | O:Anterior medial surface of ulna | I:Distal phalanges of digits 2-5 | A:Flexes wrist and digits 2-5 |
Extensor carpi radialis longus | O:Distal humerus | I:2nd metacarpal | A:Extends wrist, abducts hand (radial deviation) |
Extensor digitorum | O:Lateral epicondyle humerus | I:Distal and middle phalanges of digits 2-5 | A:Extends wrist and digits 2-5 |
Extensor carpi ulnaris | O:Lateral epicondyle of humerus | I:5th metacarpal | A:Extends wrist, adducts hand (ulnar deviation) |
Iliacus | O:Iliac fossa | I:Lesser trochanter of femur | A:Flexes and laterally rotates thigh |
Psoas major | O:Lumbar vertebra | I:Lesser trochanter of femur | A:Flexes and laterally rotates thigh |
Gluteus maximus | O:Iliac crest, sacrum, and coccyx | I:Upper part of linea aspera and iliotibial tract | A:Extends and laterally rotates thigh |
Gluteus medius | O:Ilium | I:Greater trochanter of femur | A:Abducts and medially rotates thigh |
Tensor fasciae latae | O:Iliac crest | I:Tibia via iliotibial tract | A:Flexes and abducts thigh |
Adductor magnus | O:Pubis and ischium | I:Linea aspera of femur I:Linea aspera of femur | A:Adducts and extends thigh |
Adductor longus | O:Pubic crest and pubic symphysis | I:Linea aspera of femur | A:Adducts and flexes thigh |
Rectus femoris | O:Anterior Inferior iliac spine | I:Tibial tuberosity via patellar ligament | A:Extends leg (knee), flexes thigh (hip) |
Vastus medialis | O:Linea aspera of femur | I:Tibial tuberosity via patellar ligament | A:Extends leg (knee) |
Vastus lateralis | O:Greater trochanter and linea aspera of femur | I:Tibial tuberostiy via patellar ligament | A:Extends leg (knee) |
Vastus intermedius | O:Anterior femur | I:Tibial tuberosity via patellar I:Tibial tuberosity via patellar ligament | A:Extends leg (knee) |
Sartorius | O:Anterior superior iliac spine | I:Medial tibia | A:Flexes leg (knee, flexes, abducts, and laterally rotates thigh (hip) |
Biceps femoris | O:Ischial tuberosity and linea aspera of femur | I:Head of fibula and lateral condyle of tibia | A:Flexes leg (knee), extends thigh (hip) |
Semitendinosus | O:Ischial tuberosity | I:Proximal tibia | A:Flexes leg (knee), extends thigh (hip) |
Semimembranosus | O:Ischial tuberosity | I:Medial condyle of tibia | A:Flexes leg (knee), extends thigh (hip) |
Tibialis anterior | O:Proximal tibia | I:1st metatarsal | A:Dorsiflexes and inverts foot (ankle) |
Gastrocnemius | O:Lateral and medial condyles of femur | I:Calcaneus via calcaneal (Achilles) tendon | A:Plantar flexes foot (ankle), flexes leg (knee) |
Soleus | O:Head of fibula and medial tibia | I:Calcaneus via calcaneal (Achilles) tendon | A:Plantar flexes foot |