Human Muscle System
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Created by:
minibuddy04 on November 14, 2011
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25 terms
Terms | Definitions |
|---|---|
 Deltiod the shoulder | origin- scapular spine; lateral boarder of acromoin insertion- dektiod tuberosity of humerous action- abductus arm; flexes in medial rotiation |
| Biceps Brachii | origin-Long Head- glenoid humeral labrum; supra glenoid tuberacle insertion- radial and bicipital tuberosity action- flexes forarm |
| latissimus dorsi | origin- supraspinous process; upeer sacral segments; iliac crest; lower 3 or 4 ribs inserion- hip of the intertubercilar groove action-adduction or humerous; medial rotoation of humerous; extention(flexed position); downward rotoation of scapula |
| Infrasoinatus | origin- muscle fascia Insertion- middle facet; greater tuberacle of humerous action; external rotation of the humerous; stabilizes the gleanhumeral |
| Supraspinatus | origin- muscle fascia insertion- uppermost of three facets of the greater tuberacle of humerous action- abduction fo the arm |
| Pectoralis major | origin- 1/3 of clavicle inserion- lateral lip of the bicipital groove; crest of greater tuberacle; clavicular fibers onsert more distally; sternaal fibers more proximally action- humerous; medially rotates humerous; flexation of forarm; extention. |
| Triceps Brachii | Origin-long head- infragleniod tuberacle of scaopula; lateral head- uper half of the posterior surface of shaft of the humerous medial head- posterior shaft of the humerious distal to radial groove and both medial and lateral intermuscular septum Insertion- posterior surface of the olecranon process of th ulna Action- long- adducts arm. ahoulder and elbor flexation lateral-extends the forarm and elbow medial- same as lateral |
| Masseter | Origin-zygomatic arch(medial surface and inferior border) Insertion-lateral surface of angle and ramus of mandible Action-elevaters and protracts jaw; closed jaw |
| Gluteus Maximus | Origin-surface of ilium; prosterior to prosterior gluteal line and prosterior and inferior surface of sacrum and coccyx Insertion-gluteal tuberosity of femur; anterior of aspect of lateral tibia Action- extends laterally; rotates thigh at hip |
| Gluteus Medius | Origin-outer surface of ilium, between the prosterior and anterior gluteal lines Insertion-lateral and superior surfaces of the greater trochanter of the femur. Action- abducts the thigh at hip; anterior fibers medially rotate thigh at hip. |
| Gluteus Minimus | Origin-surface of illium prosterior to prosterior gluteal line and prosterior and inferior surface of sacrum and coccyx Insertion- gluteal tuberosity of femur Action- extends laterally; extends thigh at hip |
| Semitendinosus | Origin- ischial tuberosity Insertion- medial aspect of tibial shaft; contributes to the pez anserine Action- extends hip, flexes knee, medially rotates tibia |
| Semimbranousus | Origin- ischial tuberosity Insertion- prosterior medial aspect of medial tibial condyle Action- flexes knee, extends hip, medially rotates hip |
| sartorius | Origin- anterior, superior iliac spine Insertion- upper medial surface of body of tibia Action- flexes knee and hip; laterally rotates thigh at hip |
| Gracilis | Origin- body of the hip and inferior pubic rambus Insertion- medial surfaces of prximal tibia; inferior to tibial condyle; contributes to the pez anserine Action- adducts thigh; flexes knee medially rotates tibia |
| Vastus madialis | Origin- intertrochanteric line of femur; medial aspect of linea aspera Insertion- common quadriceps tendon into patella Action- extends knee |
| Vastus leteralis | Origin- greater trochanter; lateral hip of aspera Insertion- common quadricepstendon patella Action- extends the knee; can abnormaly displace patella |
| Trapezius | Origin- external occipital protuberance along the medial sides of the superioo nuchal line Insertion- acromion ; superior spine of scapula Action-upward rotation of the scapula |
| Gastronemius | Origin- medial head; just above condyle of femur Insertion- calcaneus via lateral portion of calcaneal Action- plantar flex; the ankle; knee flexation(whn not weight bearing) stabilizes knee and ankle when standing |
| Soleus | Origin-upper fibula Insertion- calcaneus via medial portion of calcaneal tendon Action- plantar flex the foot |
| Tibialis cranialis | Origin- lateral tibial condyle; proximal 2/3 anteriolateral surface of tibia Insertion- medial and plantar surface of base of first metatarsal Action- strongest dorsiflexor |
| Flexor digitorum longus | Origin-posterior surface of tibia; crural fascia Insertion- plantar surface of bases of the 2-5th phalanges Action- primarily flexes 2nd-th toes; weak plantar flexor; weak inversion and adduction of foot |
| Rhomboideus | Origin-inferior border of the nuchal ligament Insertion-small area of the medial boarder Action- retracts the scapula when trapezius is contracted; elevated medial border of the scapula |
| Internal oblique | Origin- iliac crest Insertion- lower ribs Action- compresses abdomen; flexes lateraly |
| Rectus Abdominus | Origin-pubic creswt; pubic symphasis Insertion- prosterior aspect of xiphoid Action- flexes trunk; aids forces expiration and rails intra-abdominal pressure |
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