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Diaphragm
- O: Central Tendon
- I: Xyphoid Process
- inferior aspect of the last rib
- lumbar vertebra
- F: diaphragm pulls CT down and forward (expanding the chest volume)
-
External Intercostal
- O: Inferior Surface of R 1-11
- I: upper surface of the rib below
- F: elevate rib
-
Internal Intercostal
- O: inferior surface of R1-11
- I: superior surface of the rib below
- F: elevate ribs 1-11
-
Sternocledomastoid
- O: mastoid process of temporal bone
- I: sternal head: superior manubrium sterni
- clavicular head: superior surface of the clavicle
- F: elevates sternum and ribcage
-
Scalene (Anterior)
- O: transverse process of vertebrae C3-C6
- I: superior surface of first rib
- F: elevates rib 1
-
Scalene (Medius)
- O: transverse process of vertebrae C2-C7
- I: superior surface of the first rib
- F: elevates rib 1
-
Scalene (Posterior)
- O: transverse process of C5-7
- I: second rib
- F: elevates rib 2
-
Serratus Posterior/Superior (4 muscles)
- O: spinous process of C7, T1-3
- I: The angles of ribs 2-5
- F: elevate ribs 2-5
-
Levatores Costarum (Brevis)
- O: transverse process of C7-T11
- I: tubercle of rib right below
- F: elevate the ribcage
-
Levatores Costarum (Longus)
- O: transverse process of T7-T10
- I: next rib (skips a rib)
- F: elevate the ribcage
-
Trapezius
- O: Spinous process of C2-T12
- I: (acromion of) scapula and superior surface of clavicle
- F: elongates neck; controls head
-
Pectoralis Major
- O: sternum (costal cartilages) and clavicle (anterior)
- I: (greater tubercle of) humerus
- F: elevates sternum and subsequently increases transverse dimesion of rib cage
-
Pectoralis minor
- O: anterior surfaces of Rib 2-5 (near chondral margin)
- I: (coracoid process of ) scapula
- F: increases transverse dimension of rib cage
-
Serratus Anterior
- O: Rib 1-9, (lateral surface of the thorax)
- I: (inner vertebral border of) scapula
- F: elevates ribs 1-9
-
Subclavius
- O: inferior surface of clavicle
- I: superior surface of Rib 1 (at chondral margin)
- F: elevates rib 1
-
Levator Scapulae
- O: Transverse process of C1-C4
- I: (Medial border of) Scapula
- F: elevates scapula, neck support
-
Rhomboideus Major
- O: Spinoud processes T2-T5
- I: Scapula
- F: stabilizes shoulder girdle
- Courses: down and lateral
-
Rhomboideus Minor
- O: Spinous processes of C7- T1
- I: (medial border of) scapula
- F: stabilizes shoulder girdle
- superior to R Major
-
Iliocostus lumborum
- O: Sacral crest, L1-L5, T11-T12
- I: Angles of ribs 6-12
- F: Stabilize and move vertebral column
-
Iliocostalis thoracis
- O: Ribs 6-12
- I: Ribs 1-6 and C7 vertebrae
- F: stabilize and move vertebral column
-
Iliocostalis cervicis
- O: Ribs 3-6
- I: C4-C6 vertebrae
- F: stabilize and move vertebral column
-
Logissimus thoracis
- O: L1-L5 transverse processes and thoracolumbar fascia
- I: T1-T12 vertebrae, transverse processes and ribs 3-12
- F: stabilize and move the vertebral column
-
Logissimus cervicis
- O: T1-T5 vertebrae
- I: C2-C6 vertebrae, transverse processes
- Function: Stabilize and move vertebral column
-
Logissimus Capitalis
- O: C1-C5 vertebrae
- I: Posterior mastoid process of temporal bone
- F: stabilize and move vertebral column
-
Spinalis thoracis
- O: T11 and T12; L1-L3 vertebrae
- I: T1-T8
- F: stabilize and move vertebral column
-
Spinalis cervicis
- O: nuchal ligament and C7 vertebra
- I: C2 vertebra
- F:stabilize and move vertebral column
-
Spinalis capitis
- O: T1-T6, C4-C7
- I: Nuchal Line of the skull
- F: Stabilize and move vertebral column
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