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Respirationmuscles
musclesofrespiration
| Question | Answer |
|---|---|
| External Oblique | raises intra-abdominal and intra-thoracic pressure; compresses abdominal contents |
| Internal Oblique | aids the externa obliques and may aid forced exhalation |
| Transversus Abdominus | aids the externa obliques and may aid forced exhalation |
| Rectus Abdominus | assists in compression of the abdomen, flexes lumbar vertebrae |
| Pyramidalis | may not exist in some people. anterior to the lowermost part of the rectus. |
| Quadratus Lumborum | May be active in exhalation; anchors lower 2 ribs |
| Illiacus | may aid in exhalation |
| Psoas Major, Psoas Minor | May aid in exhalation |
| sternocleidomastoid | with head anchored, may raise the sternum and clavicle. |
| Scalenus Anterior | Raises first rib |
| Scalenus Medius | Raises first rib |
| Scalenus Posterior | Raises second rib |
| Trapezius | Rotates scapula, raises shoulder, turns head and tilts it backward |
| Latissimus Dorsi | Extends, adducts, rotates arms medially; may influence the lower 3 or 4 ribs |
| Rhomboids | Draws scapula toward spinal column, adducts the arm |
| Levator Scapulae | Elevates and anchors the scapula |
| Diaphragm | Primary muscle of inhalation |
| Internal Intercostals | Aids in increasing thoracic volume, but may also assist in exhalation |
| External Intercostals | With upper ribs anchored, the lower ribs are elevated |
| Subcostals | Action not fully understood, may be partially exhalatory |
| Levator Costarum Brevis | Elevates the lower posterior ribs, increasing volume |
| Levator Costarum Longus | Elevates the lower posterior ribs, increasing volume |
| Serratus Posterior Superior | Possibly elevates the ribs |
| Serratus Posterior Inferior | Exerts a downward force on lower ribs during forced inhalation |
| Lateral Iliocostalis | May influence rib movements during respiration. Starts at illium and goes up and fans out. |
| Longissimus Dorsi | Medial to Lateral iliocostalis. Goes straight up the backbone (lateral & parallel to vertebrae). |
| Pectoralis Major | fan shaped. Rotation of the arm. |
| Pectoralis Minor | Deep & smaller than major. Extends the shoulder. |
| Subclavius | Below clavicle and runnning parallel to clavicle. Draws the shoulder forward and slightly downward. |
| Serratus Anterior | Has a serrated (jagged) apperance. Anchors and protracts the scapula. |
Created by:
bertaka
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