Muscles: Origin, Insertion, and Action
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Created by:
wykidlixswt23 on November 8, 2009
Subjects:
Classes:
Anatomy and physiology, Anatomy and Physiology
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47 terms
Latin | English |
|---|---|
| Pectoralis Major |  Origin: Clavicle, sternum, cartilages of ribs 1-7 Insertion: Crest of greater tubercle of humerus Action: flexes, adducts, and medially rotates arm |
| Deltoid | Origin: Clavicle, acromion process, spine of scapula Insertion: Deltoid tuberosity of the humerus Action: Abducts arm; flexes, extends, medially, and laterally rotates arm |
| Teres Major | Origin: Inferior angle of scapula Insertion: Crest of lesser tubercle of humerus Action: Extends, adducts, and medially rotates arm |
| Subscapularis | Origin: Subscapular fossa Insertion: Lesser tubercle of humerus Action: Medially rotates arm, stabilizes shoulder joint |
| Latissimus Dorsi | Origin: T7-12, L1-5, S1-5, Crest of ilium, ribs 10-12 Insertion: Intertubercular groove of humerus Action: Extends, adducts, and medially raises arm; draws shoulder inferiorly. |
| Supraspinatus | Origin: Suprapinous Fossa Insertion: Greater tubercle of humerus Action: Abducts arm, helps stabilize shoulder joint |
| Infraspinatus | Origin: Infraspinous Fossa Insertion: Greater tubercle of humerus Action: Laterally rotates arm, stabilizes shoulder joint |
| Teres Minor | Origin: Lateral border of scapula Insertion: Greater tubercle of humerus Action: Laterally rotates and adducts arm, stabilizes shoulder joint |
| Biceps Brachii | Origin: Long head; superior margin of glenoid fossa Short Head; Coracoid process of scapula Insertion: Radial Tuberosity Action: Flexes arm, flexes forearm, supinates hand |
| Brachialis | Origin: Anterior, distal surface of humerus Insertion: coronoid process of ulna Action: Flexes forearm |
| Triceps Brachii | Origin: Infraglenoid tuberosity of scapula, lateral and posterior surface of humerus Insertion: Olecranon process, tuberosity of ulna Action: Extends and adducts arm, extends forearm |
| Brachioradialis | Origin: Lateral supracondylar ridge of humerus Insertion: styloid process of radius Action: Flexes forearm |
| Gracillis | Origin: Symphysis Pubis Insertion: Proximal, medial tibia Action: Adducts thigh, flexes leg |
| Tensor fasciae latae | Origin: iliac crest, anterior iliac surface Insertion: iliotibial band of fasciae latae Action: Flexes, abducts, and medially rotates thigh |
| Gluteus Maximus | Origin: Outer iliac blade, iliac crest, sacrum, coccyx Insertion: Gluteal tuberosity of femur, iliotibial band of fasciae latae Action: Extends and laterally rotates thigh, braces knee |
| Gluteus Medius | Origin: Outer iliac blade Insertion: Greater trochanter of femur Action: Abducts and medially rotates thigh |
| Adductor Magnus | Origin: Pubis, ischium Insertion: Gluteal tuberosity, linea aspera, adductor tubercle of distal femur Action: Adducts, flexes, extends and laterally rotates thigh |
| Sartorius | Origin: Anterior superior iliac spine Insertion: Proximal, medial tibia Action: Flexes and laterally rotates thigh, flexes leg |
| Rectus Femoris | Origin: Anterior inferior iliac spine, margin of acetabulum Insertion: Tibial tuberosity by patellar tendon Action: Flexes thigh, extends leg |
| Vastus Lateralis | Origin: Greater trochanter of femur, linea aspera of femur Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg |
| Vastus medialis | Origin: Linea aspera, medial side Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg |
| Vastus Intermedius | Origin: Proximal, anterior femur Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg |
| Biceps Femoris | Origin: Ischial tuberosity, Linea aspera Insertion: Head of fibula, lateral condyle of tibia Action: Extends thigh, flexes leg |
| Semitendinosus | Origin: Ischial Tuberosity Insertion: Proximal, medial tibia Action: Extends thigh, flexes leg |
| Semimembranosus | Origin: Ischial tuberosity Insertion: Medial condyle of tibia Action: Extends thigh, flexes leg |
| Tibialis anterior | Origin: Lateral condyle and proximal tibia Insertion: First metatarsal and first cuneiform Action: Dorsiflexes and inverts foot |
| Gastrocnemius | Origin: Condyles of femur Insertion: Calcaneus by calcaneal tendon Action: Flexes leg, plantar flexes foot |
| Soleus | Origin:Posterior, proximal tibia and fibula Insertion: Calcaneus by calcaneal tendon Action: Plantar flexes foot |
| Peroneus longus | Origin: Head and shaft of fibula, lateral condyle of tibia Insertion: First metatarsal, first cuneiform Action: Plantar flexes and everts foot |
| Extensor digitorum longus | Origin: Lateral COndyle of tibia, shaft of fibula Insertion: Middle of distal phalanges of second through fifth digits Action: Extends toes, dorsiflexes foot |
| Pectoralis minor | Origin: Insertion: Action: |
| External intercostal | Origin: Inferior border of a rib Insertion: Superior border of rib below Action: Elevates ribs (increases volume in thorax) |
| Internal intercostals | Origin: Inferior border of a rib Insertion: Superior border of rib below Action: Depresses ribs (decreases volume in thorax) |
| Tapezius | Origin: Posterior occipital bone, ligamentum nuchae, C7-T12 Insertion: Clavicle, Acromion process, and spine of scapula Action: Extends and abducts head, rotates and adducts scapula, fixes scapula |
| Rhomboid major | Origin: Spines of T2-5 Insertion: Lower one-third of vertebral border of scapula Action: adducts scapula (draws scapulae together) |
| Rhomboid minor | Origin: Ligamentum nuchae, Spines C7-T1 Insertion: Vertebral border of scapula at scapular spine Action: Adducts scapula (draws scapulae together) |
| Frontalis | Origin: Galea aponeurotica Insertion: Skin superior to orbit Action: Raises eyebrows, draws scalp anteriorly |
| Orbicularis oris | Origin: Fascia of facial muscles near mouth Insertion: Skin of lips Action: Closes lips |
| Orbicularis oculi | Origin: Frontal and maxilla on medial margin of orbit Insertion: Skin of eyelid Action: Closes eyelid |
| Masseter | Origin: Zygomatic arch Insertion: Angle and ramus of mandible Action: Closes mandible |
| Temporalis | Origin: Temporal fossa Insertion: coronoid process and ramus of mandible Action: Closes mandible |
| Sternocleidomastoid | Origin: Sternum, clavicle Insertion: Mastoid process of temporal Action: Abducts, rotates, and flexes head |
| Serratus Anterior | Origin: Ribs 1-8 Insertion: Vertebral border and inferior angle of scapula Action: Abducts scapula (moves scapula away from spinal column) |
| Rectus Abdominis | Origin: Crest of pubis, symphysis pubis Insertion: Cartilages of ribs 5-7, xiphoid process Action: Flexes vertebral column, compresses abdominal wall |
| External oblique | Origin: Ribs 5-12 Insertion: Linea alba, iliac crest, pubis Action: Compresses abdominal wall, laterally rotates trunk |
| Internal oblique | Origin: Inguinal ligament, iliac crest Insertion: Linea alba, ribs 10-12 Action: Compresses abdominal wall, laterally rotates trunk |
| Transverse abdominus | Origin: Insertion: Action: |
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