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17 Cards in this Set
- Front
- Back
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External Intercostals |
O: costal tubercles I: almost to costal cartilages A: elevate ribs inspiration: stabilize chest wall IN: corresponding Intercostal nerves |
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Internal Intercostals |
O: sternum I: costal angle A: depress ribs expiration; stabilize chest wall IN: Corresponding Intercostal nerves |
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Innermost intercostals |
O: middle 2 quarters of lower spaces I: " " A: depress ribs expiration; stabilize chest wall IN: corresponding Intercostal nerves |
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Subcostals |
innermost intercostals that cross 2 or 3 intercostal spaces near costal angle; lower thorax |
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Levatores costarum |
O: transverse processes of C7-T11 I: b/t rib angle and tubercle of rib 1 or 2 below A: elevate costal cartilages inspiration IN: ventral rami of corresponding thoracic spinal nerves |
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Trasversus thoracis |
O: lower 1/3 posterior sternum, xiphoid process, costal cartilages of ribs 4 or 5-7 I: costal cartilages of ribs 2-6 A: depress costal cartilages expiration IN: adjacent intercostal nerves |
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Diaphragm |
O: sternal - back of xiphoid process; costal - inner lower 6 costal cartilages and their ribs, lumbar - medial/lateral arcuate ligaments, thickening fascia on superior quadratus lumborum & psoas major, upper 3 lumbar vertebral bodies near LR crura I: central tendon A: depress during inspiration, elevate during expiration IN: C345 phrenic nerve |
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Muscles for quiet inspiration |
diaphragm (but scalenes and intercostals are active) |
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Muscles for deep inspiration/forced respiration |
scalenes, sternocleidomastoid, quadratus lumborum, erector spinae, serratus posterior and anterior, pectoral muscles, trapezius |
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Muscles for active expiration |
abdominal muscles and latissimus dorsi |
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intercostal nerves |
ventral rami of T1-T11 that innervate abdominal and thoracic walls; each nerve ends in an anterior cutaneous branch |
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subcostal nerve |
ventral ramus of T12; emerges beneath rib 12 |
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external obliques |
O: outer surfaces and lower borders of ribs 5-12; intertwines with SA & LT I: linea alba, anterior half of iliac crest A: trunk flexion, compression & support ab viscera, depress thorax, aids in respiration, posterior pelvic tilt, same side bend, opposite rotation IN: T7-T12 intercostal nerves |
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internal obliques |
O: ant. 2/3 of iliac crest, lateral 2/3 of inguinal lig, thoracolumbar fascia I: outer surfaces and lower borders of costal cartilages of ribs 7-9, inferior borders of ribs 9-12, linea alba, pubic crest and pecten pubis A: trunk flexion, compression and support of ab viscera, depress thorax, Inc. tension of thoracolumbar fascia, same side bend and rotation IN: T7-T12 intercostal nerves, L1 |
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transversus abdominis |
O: ant. 2/3 iliac crest, lateral 1/3 of inguinal lig, thoracolumbar fascia, inner lower 6 costal cartilages I: linea alba, pubic crest & pecten pubis A: girdle that flattens ab wall & compress ab viscera, dec infrasternal angle in expiration, Inc. thoracolumbar fascia tension IN: T7-T12 intercostal nerves, L1 |
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rectus abdominis |
O: pubic tubercle, crest & symphysis I: side of xiphoid process, 5-7 costal cartilages A: trunk flexion, lateral flexion, posterior pelvic tilt IN: T6-T12 intercostal nerves |
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quadratus lumborum |
O: iliolumbar lig, adjacent iliac crest I: lower border rib 12, transverse processes of L1-L4 A: lumbar spine extension, lumbar spine side bend, depress rib 12 in inspiration, hip hike IN: T12 subcostal & L1-3/4 |
