ORIGINS AND INSERTIONS: Muscular System BIOL 2320

Kevin Young

Temporalis

O: Superior and inferior portion of temporal bone

I: Coronoid process of mandible

Masseter

O: Zygomatic arch

I: Lateral surface and angle of mandible, lateral surface of coronoid process

Sternocleidomastoid

O: Manubrium and sternal ends of clavicles

I: Mastoid process of the temporal bone

Rectus Abdominis

O: Superior surface of pubis near symphysis

I: Xiphoid process, Inferior surface of middle ribs

Trapezius

O: Occipital bone, Ligamentum nuchae, and spinous processes of C7-T12

I: Clavicle, acromion process, and spine of scapula

Latissimus Dorsi

O: Spinous processes of T7-T12, lower ribs, iliac crest, thoracolumbar fascia

I: Intertubercular groove of humerus

Pectoralis Major

O: Medial clavicle, costal cartilages of upper ribs, body of sternum

I: Lateral part of intertubercular groove of the humerus

Deltoid

O: Acromial end of clavicle, the acromion and spine of scapula

I: Deltoid tuberosity of humerus

Biceps Brachii LONG HEAD

O: supraglenoid tubercle of scapula

I: radial tuberosity and bicipital aponeurosis

Biceps Brachii SHORT HEAD

O: Coracoid process of scapula

I: Radial tuberosity and bicipital aponeurosis

Brachioradialis

O: Lateral epicondyle of humerus

I: Styloid process of radius

Triceps Brachii LONG HEAD

O: Infraglenoid tubercle of scapula

I: Olecranon of ulna

Triceps Brachii LATERAL HEAD

O: Posterior humerus above radial groove

I: olecranon of ulna

Triceps Brachii MEDIAL HEAD

O: Posterior humerus below radial groove

I: Olecranon of ulna

Sartorius

O: Anterior superior iliac spine

I: Medial side of tibial tuberosity (pes anserine)

Tensor Fascia Latae

O: Iliac crest and lateral surface of anterior superior iliac spine

I: Iliotibial track (IT band)

Gluteus Maximus

O: Iliac crest, sacrum, and coccyx

I: IT band, Linea aspera of femur, and gluteal tuberosity of femur

Iliacus and Psoas Major (Iliopsoas)

O: Don’t need to know

I: Lesser trochanter

Rectus Femoris (Quad)

O: Anterior inferior iliac spine

I: Quadriceps tendon to patella, then patellar ligament to tibial tuberosity

Vastus Lateralis

O: Greater trochanter and linea aspera of femur

I: Quadriceps tendon to patella, then patellar ligament to tibial tuberosity

Vastus Medialis

O: Intertrochanteric line and linea aspera of femur

I: Quadriceps tendon to patella, then patellar ligament to tibial tuberosity

Vastus Intermedius

O: Anterior and lateral surface of femur

I: Quadriceps tendon to patella, then patellar ligament to tibial tuberosity

Biceps Femoris (Hamstrings) LONG HEAD

O: ischial tuberosity

I: Head of fibula

Biceps Femoris SHORT HEAD

O: Linea aspera of femur

I: Head of fibula

Semitendinosis

O: Ischial tuberosity

I: Medial side of the tibial tuberosity (pes anserine)

Semimembranosus

O: Ischial tuberosity

I: Posterior surface of medial condyle of tibia

Gastrocnemius

O: Two heads: Superior posterior lateral and medial condyles of femur

I: Calcaneus via the calcaneal (Achilles) tendon

Pes anserine muscles

Sartorius

Gracilis

Semitendinosis

Intramuscular Injections (IM)

Deltoid

Gluteus maximus

vastus lateralis

Muscles of mastication

temporalis

masseter

lateral and medial pterygoids

Muscles of facial expression

Epicranius (galea aponeurotica)

Frontal belly of occipitofrontalis

occipital belly of occipitofrontalis

Orbicularis oris

platysma

buccinator

Muscles of respiration

External intercostals: Rest

Internal intercostals: Forced

Are any muscles used for restful exhalation?

no