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11 Cards in this Set
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Diaphragm m.
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Origin xiphoid process
inner aspect of R7-R12 lumbar vertebrae Insertion: Central tendon |
The primary muscle of inhalation; increases the longitudinal volume of the thoracic cavity and compresses the abdominal visera |
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External Intercostals M.
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Origin: Lower border of R1-R11
Insertion: Upper surface of the rib immediately below |
As each successive upper rib is anchored, the rib immediately below is elevated |
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Internal interchrondal Intercostals m.
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Origin: Lower border of R1-R11
Upper surface of the rib immediately below |
The portions fo the muscles along the anterior rib cage (ie sternum) act similarly to the external intercostals |
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serratus anterior m.
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Origin: R1-R8 sometimes 9
Insertion: Outer surface of the ribs and inner surface of the scapula |
With scapula fixed, elevates R1-R8 and in some cases R9 |
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serratus posterior superior m
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Origin: Spinous process of C7 and T1-T2 sometimes T3
Insertion: lateral to the angle of R2-R5 |
Elevates R2-R5 |
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Sternocleidomastoid M
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Origin: Sternum: anterior manubrium, Clavicle: proximal sternal end
Insertion: 2 heads unite and attach to mastoid process |
with the head fixed elevates the sternum and clavicle |
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trapezius m
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Origin: external occipital protuberance & superior nuchal line of occipital bone spinous process C7-T12
Insertion: lateral 1/3 of clavicle acromion + spine of scapula |
maintains trunk stability for respiration |
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pectoralis major m
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greater tubercle of humerous
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scalenus m. :anterior, medius, and posterior
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Origin: Transverse process of C2-C7
Insertion: upper surfaces of Ribs 1+2 |
Elevate ribs |
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scalenus m. :anterior, medius, and posterior
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Origin: Transverse process of C2-C7
Insertion: upper surfaces of Ribs 1+2 |
Elevate ribs |
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scalenus m. :anterior, medius, and posterior
|
Origin: Transverse process of C2-C7
Insertion: upper surfaces of Ribs 1+2 |
Elevate ribs |
