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Muscles of inspirat.
Muscles involved in inspiration
| Question | Answer |
|---|---|
| External intercoastals | Origin: Inferior surface of R 1-11 Insertion: superior surface of the rib below |
| Internal intercoastals | Origin: Inferior margin of R 1-11 Insertion: superior surface of the rib below |
| Sternocleidomastiod | Origin: Sternum and clavicle Insertion: mastoid process |
| Anterior scalene | Origin: Transverse process of C3-6 Insertion: superior surface of the first rib |
| Middle scalene | Origin: Transverse process of C2-7 Insertion: superior surface of the first rib |
| Serratus posterior superior | Origin: Spinous process of C7, T1-3 Insertion: angles of ribs 2-5 |
| Posterior scalene | Origin: Transverse process of C5-7 Insertion: second rib |
| Levatores Costarum brevis | Origin: Transverse process of C7-T11 Insertion: superior surface of the rib below |
| Trapezius | Origin: Spinous process of C2-T12 Insertion: scapula and clavicle |
| Levatores Costarum longis | Origin: transverse process of T7-10 Insertion: superior surface two ribs below |
| Pectoralis Major | Origin: sternum and clavicle Insertion: humerus |
| Pectoralis Minor | Origin: superior surface of ribs 3-5 Insertion: scapula |
| Serratus Anterior | Origin: Ribs 1-8 Insertion: scapula |
| Subclavious | Origin: clavicle Insertion: scapula |
| Levator scapulae | Origin: transverse process of C1-4 Insertion: scapula |
| Rhomboideus Major | Origin: T2-5 Insertion: scapula |
| Rhomboideus Minor | Origin: C7-T1 Insertion: scapula |