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34 Cards in this Set
- Front
- Back
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Origin, insertion and function of the trapezius |
Origin: At base of occipital bone (nuchal line) & all cervical & thoracic vertebrae Insertion: Inserts on the spine of scapula, the acromion, & clavicle Function: Scapular elevation, adduction/retraction, upward rotation & depression, neck extension |
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Origin, insertion and function of the teres major
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Origin: Inferior lateral border of scapula Insertion: Along with pectoralis mahor & latttisimus dorsi, teres major inserts at the medial lip of the intertubercular groove of humerus Function: Medial rotator, adductor & along with posterior head of the deltoid & latissimus dorsi, extends the humerus at the arm |
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Biceps brachii
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the prominent muscle on the front side of the upper arm |
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Origin, insertion and function of the biceps brachii
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Origin: (2 places on scapula) The short head: the tip of the coracoid process. The long head: the supraglenoid tubercle Insertion: Its tendon attaches on the radial tuberosity Function: Powerful supinator of the forearm; once forearm is supine, biceps brachii flexes elbow |
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Brachioradialis
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its name comes from its attachment to upper arm (brachium) & radius (radialis) |
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Origin, insertion and function of the brachioradialis
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Origin: Above the lateral epicondyle of humerus Insertion: Styloid process on radius Function: Powerful elbow flexor when radioulnar joint is midway between supination & pronation. More influential if forearm is pronated. |
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Origin, insertion and function of the pronator teres
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Origin: On medial epicondye of humerus & coronoid process of ulna Insertion: Lateral surface of the midshaft of radius Function: Pronates forearm |
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Origin, insertion and function of the tensor fascia latae
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Origin: Anterior iliac crest Insertion: Iliotibial tract Function: Flexion, abduction & medial rotation of the thigh |
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Sartorius
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a superficial anterior muscle of the thigh. From Latin word sartor meaning "to mend" |
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Origin, insertion and function of the sartorius
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Origin: Anterior superior iliac spine Insertion: Medial surface of tibia Function: Acts across 2 joints. Allows flexion & outward rotation of hip, & helps flex knee |
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Origin, insertion and function of the psoas minor
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Origin: 12th thoracic & 1st lumbar vertebrae Insertion: Top of pubic bone Function: Weak trunk flexor |
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Origin, insertion and function of the adductor longus
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Origin: At the body of pubis Insertion: linea aspera Function: Hip adduction |
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Origin, insertion and function of the adductor magnus
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Origin: Inferior ramus of pubis & ischial tuberosity Insertion: linea aspera & adductor tubercle Function: Hip adduction & extension |
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Origin, insertion and function of the rectus femoris
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Origin: Anterior inferior iliac spine Insertion: All quadriceps muscles joint at the patellar tendon, which wraps around the patellar ligament & inserts on the tibial tuberosity of the tibia. Function: Knee extension & hip flexion |
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Origin, insertion and function of the biceps femoris
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Origin: 2 heads: tibial tuberosity & linea aspera Insertion: Its fibres join & insert into the head of the fibula Function: Hip extension, knee flexion, externally rotates the flexed knee |
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Origin, insertion and function of the tibialis anterior
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Origin: Anterior shaft of tibia Insertion: Medial cuneiform & base of first metatarsal Function: Dorsiflexes ankle & inverts foot |
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Origin, insertion and function of the gastrocnemius
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Origin: Has lateral & medial head; originating from the lateral & medial epicondyles of the femor. Together they form the calf Insertion: Heads attach a common tendon & fuse with tendon of soleus to form calcaneal tendon (Achilles tendon); inserts at calcaneus Function: Plantar flexion, knee flexion |
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Sternocleidomastoid
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the broad superficial muscle running upward at each side of the neck |
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Origin, insertion and function of the sternocleidomastoid
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Originates: the sternum and the clavicle Inserts: mastoid process (temporal bone, behind the ear) Function: flexes the head from side to side and rotates it |
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Splenius
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runs along the posterior surface of the neck and joins the skull with the spine
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Origin, insertion and function of the splenius
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Originates: the last 4 cervical vertebrae and the upper thoracic vertebrae Inserts: onto the temporal and occipital bones (nuchal line) and upper cervical vertebrae Function: rotates the neck and head |
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Longissimus
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lateral to spinalis, has capitus, cervicis & thoracis attachments
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Origin, insertion and function of the longissimus
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Origin: Cervical, thoracic & lumbar vertebrae Insertion: Mastoid process & cervical & thoracic vertebrae Function: Extend & laterally flex the spine & head |
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Rectus Abdominus
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located on each side of a tendinous line extending from the xiphoid process to the pubis. Also transected horizontally by 3 tendinous intersections creating the "washboard" appearance |
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Origin, insertion and function of the rectus abdominis
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Origin: At the pubic crest & symphysis pubis Insertion: The xiphoid process & the inferior ribs Function: Serves to flex the trunk & aids in expiration, defecation & childbirth |
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Origin, insertion and function of the external oblique |
Origin: On the lower 8 ribs Insertion: On the iliac crest & linea alba & pubis Function: Flex & rotate the vertebral column & compress the abdomen during forced expiration |
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Pectoralis Major
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thick muscle covering most of the front of the chest |
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Origin, insertion and function of the pectoralis major
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Origin: The upper part on clavicle; the lower part from sternum & costal cartilage of ribs 1-6; abdominal part from external obliques Insertion: Both heads unite within a tendon & insert on the lateral lip of the intertubercular groove Function: Allows internal rotation, adduction & flexion of the arm |
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Latissimus Dorsi
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makes up about a quarter of the back area known as "lats"/"wings" |
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Origin, insertion and function of the latissimus dorsi
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Origin: Along the lumbar & lower half of the thoracic vertebrae & the iliac crest & sacrum Insertion: Its tendon inserts on the humerus on floor of the intertubercular groove under pectoralis major's muscle tendon Function: An adductor, extensor & internal rotator of the arm |
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Supraspinatus
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is above the spine of the scapula
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Origin, insertion and function of the supraspinatus
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Origin: Originates & rests on the posterior surface of the scapula above its spine in the supraspinous fossa Insertion: forms a common tendon that inserts on the greater tubercle of the humerus Function: help stabilize the shoulder joint. Supraspinatous abducts the shoulder. |
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Subscapularis
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large triangular muscle & only S.I.T.S. muscle located on anterior surface of scapula |
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Origin, insertion and function of the subscapularis
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Origin: On anterior surface of scapula on the subscapular fossa Insertion: Only rotator cuff muscle that inserts on lesser tubercle of humerus Function: Rotates humerus medially & Stabilizes shoulder |
