Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Sternocleidomastoid |
O- mastoid process of temporal bone I- superior portion of manubrium & clavicle F- elevates sternum & ribcage Inspiration |
|
|
|
Scalenus anterior/medius/posterior |
O- transverse process C3-6, C2-7, C5-7 I- superior surfaces of ribs 1/2 F- elevates ribs 1/2 Inspiration |
|
|
|
Pectoralis major |
O- sternal head; length of sternum at costal cartilages; clavicular head; and anterior clavicle I- course fan like laterally, converging at humerus F- pulls sternum and ribs upward Inspiration |
|
|
|
Pectoralis minor |
O- anterior surface of ribs 2-5 near chondral margin I- courses up&laterally to coracoid process of scapula F- increases transverse/lateral dimension of ribcage Inspiration |
|
|
|
Subclavius |
O- interior surface of clavicle I- superior surface of rib 1 at chondral margin F- elevates first rib Inspiration |
|
|
|
Serratus anterior |
O- ribs 1-8 or 9 I- course between the outer surface of ribs & inner surface of scapula, inserting along vertebral border F- elevates upper ribs Inspiration |
|
|
|
External intercostals |
O- inferior surface of ribs 1-11 I- course down to superior surface of the rib directly below F- when they contract, elevates ribs Inspiration |
|
|
|
Internal intercostal (between ribs) |
Interosseous portion O- inferior margin of ribs 1-11(just the bone portion) I- superior surface of rib directly below (fills the space between ribs) F- depresses ribs 1-11 Expiration |
|
|
|
Internal intercostal (between costal cartilages) |
Intercartilaginous portion O- inferior surface of ribs 1-11 at the anterior cartilaginous portion of the ribs (under external) I- course down to the upper surface of the rib directly below F- elevates ribs Inspiration |
|
|
|
Transversus thoracis |
O- posterior surface of the sternum along body and xyphoid process I- course up and laterally to insert at inner chondral surface of ribs 2-6 F- depresses ribcage Expiration |
|
|
|
Latissimus dorsi |
O- lower 6 thoracic vertebrae along with lumbar, sacral, and back surfaces of ribs 8/9-12 I- fibers course up and attach to humerus F- when humerus is fixed, contraction elevates lower ribs. Whole muscle contraction compresses lower ribcage Inspiration AND expiration |
|
|
|
Serratus posterior superior |
O- spinous process of C7 & T1-3 I- ribs 2-5 F- elevates ribs Inspiration |
|
|
|
Serratus posterior inferior |
O- spinous process of T11&12, L1-3 I- course up and laterally to insert at lower margin of ribs 8-12 F- pulls rib cage down, involved in support of expiratory effort Expiration |
|
|
|
Lateral iliocostalis cervicis |
O- outer surface of ribs 3-6 I- upward and toward midline to insert into C4-6 F- elevates ribs 3-6 Inspiration |
|
|
|
Lateral iliocostalis thoracis |
O- upper edges of lower 6 ribs I- lower edges of upper 6 ribs F- stabilizes large segments of the back of the ribcage wall & involved in ribcage depression and elevation Inspiration and Expiration |
Posterior view |
|
|
Lateral iliocostalis lumborum |
O- back surfaces of coral bone, lumbodorsal fascia, lumbar vertebrae I- courses upwards and medically to lower edges of ribs 7-12; back half of iliac crest F- depresses lower 6 ribs Expiration |
|
|
|
Levatores costarum |
O- C7 & T1-11 I- extend downward & slightly outward to insert into the back surface of the rib immediately below the vertebra of origin F- elevates ribs Inspiration |
|
|
|
Quadratus lumborum |
O- top of coxal bone I- runs upward and toward midline into L1-4 and lower border of inner half of lowest rib F- pulls lowest rib downward Expiration |
Posterior view |
|
|
Subcostal |
O- inner surface of rib near angle I- down and laterally to insert on the inner surface of the 2nd/3rd rib below (ribs 7-12; 3-4 muscles) F- depresses thorax Expiration |
|
|
|
Diaphragm |
O- xyphoid process of sternum, inferior margin of ribcage (7-12), corpus or L1, transverse process of L1-5 I- fibers course up and medially to the central tendon of ________ F- distents abdomen Inspiration |
|
|
|
Rectus abdominis |
O- upper front edge of coxal bone I- runs upwards vertically to insert into the outer surfaces of the 5th, 6th, and 7th costal cartilages & lower sternum F- pulls the lower ribs & sternum downwards & forces the front of abdominal wall inward Expiration |
6 pack abs |
|
|
External oblique |
O- upper surface of the coxal bone & abdominal aponeurosis near midline I- upward & toward the side; outer surfaces & lower borders of lower 8 ribs F- pulls lower ribs downward & forces front/side of abdominal wall inward Expiration |
|
|
|
Internal oblique |
O- upper surface of coxal bone & lumbodorsal fascia I- fans out and inserts into abdominal aponeurosis & lower borders of costal cartilages of lower 3/4 ribs F- pulls lower ribs downward & forces front & side of abdominal wall inward Expiration |
Lies directly underneath another muscle |
|
|
Transversus abdominis |
O- posterior abdominal wall at vertebral column via thoracolumbar fascia of the abdominal aponeurosis I- courses laterally to insert at the transverse abdominis aponeurosis & inner surface is ribs 6-12 F- compresses abdomen Expiration |
|
