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Muscles of inspirat.

Muscles involved in inspiration

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
Created by: sarahgreer89



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