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Thorax

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Rib One articulates with vertebra T1(synovial), transverse process T1(synovial), costochondral junction of rib1(cartilaginous) and sternocostal junction of rib 1(cartilaginous).
Rib Two articulates with superior part vertebra T2(synovial), inferior part vertebra T1,(synovial) transverse process T2(synovial), costochondral junction of rib2(cartilaginous) and sternocostal junction of rib 2(cartilaginous).
Rib Three- superior part vertebra T3(synovial), inferior part vertebra T2(synovial) transverse process T3(synovial), costochondral junction of rib3(cartilaginous) and sternocostal junction of rib 3(cartilaginous)
Rib Four- superior part vertebra T4(synovial), inferior part vertebra T3(synovial) transverse process T4(synovial), costochondral junction of rib4(cartilaginous) and sternocostal junction of rib 4(cartilaginous)
Rib Five- superior part vertebra T5(synovial), inferior part vertebra T4(synovial) transverse process T5(synovial), costochondral junction of rib5(cartilaginous) and sternocostal junction of rib 5(cartilaginous)
Rib Six- superior part vertebra T6(synovial), inferior part vertebra T5(synovial) transverse process T6(synovial), costochondral junction of rib6(cartilaginous) and sternocostal junction of rib 6(cartilaginous)and interchondral with rib 7(plane synovial).
Rib Seven- superior part vertebra T7(synovial), inferior part vertebra T6(synovial) transverse process T7(synovial), costochondral junction of rib 7(cartilaginous) and sternocostal junction of rib 7(cartilaginous)and interchondral with rib 6 and 8 (plane synovial).
Rib Eight- superior part vertebra T8(synovial), inferior part vertebra T7(synovial) transverse process T8(synovial), costochondral junction of rib 8(cartilaginous) and sternocostal junction of rib 7(cartilaginous)and interchondral with rib 7 and 9 (plane synovial).
Rib Nine- superior part vertebra T9(synovial), inferior part vertebra T8(synovial) transverse process T9(synovial), costochondral junction of rib 9(cartilaginous) and sternocostal junction of rib 7(cartilaginous)and interchondral with rib 8 (plane synovial).
Rib Ten- superior part vertebra T10(synovial), inferior part vertebra T9(synovial) transverse process T10(synovial), costochondral junction of rib 10(cartilaginous) and sternocostal junction of rib 7(cartilaginous)
Rib Eleven-Vetrebra T11(synovial)
Rib Twelve-Vetrebra T12( synovial)

The thoracic cage is composed of the thoracic vertebrae dorsally, the ribs laterally, and the sternum and costal cartilages anteriorly. This cage, forms a protective cage around the heart, lungs, and great blood vessels, supports the shoulder girdles and upper limbs, provides attachment for the neck, back, chest, and shoulder muscles and uses intercostal muscles to lift and depress the thorax during breathing

The thoracic wall includes the thoracic cage and includes the skin, muscles, and subcutaneous tissues. Therefore, this wall includes: ribs, sternum and thoracic vertebrae, the intercostal (superficial and deep) muscles, and the external respiratory muscles (transverse thoracic, rectus thoracic, serratus dorsalis and scalenus), and the costal pleura.

-The knife would pass through the skin, fat and subcanteous material. The intercostal nerves provide sensation to the skin. Lateral thoracic artery-blood to the muscles and tissues.
-The pectoralis major will be hit next. (We are hitting between ribs 3-4 in the area inferior to the clavicle) The pectoralis major PA- ventral surface of the sternum down the 7th rib, sternal half of clavicle, cartilage of true ribs, and aponeuris of the external oblique muscles, DA- lateral lip of the intertubercular groove of the humerus-A- protracts scapula,adducts and medially rotates arm, clavicular head flexes humerus and with insertion fixed it assists in elevation of the thorax. I- medial and lateral pecotal nerves (C5-C8, T1).
- The knife would then hit the pectoralis minor-PA- anterior surfaces of the 3-5 rib, DA- coracoid process of the scapula-A- with ribs fixed- draws scapula down and forward, with scapula fixed, it draws the rib cage superiorly, I- medial pectoral nerve( C8, T1)
-The serratus anterior will be struck next- PA- outer surfaces and superior borders of the first eight-nine ribs DA-anterior surface of the medial border of the scapula A- abduction, protracts, and upwardly rotates the scapula; holds scapula against thorax. I- long thoracic nerve (C5-C6)
-The intercostals would be hit next. The external intercostal –PA- lower margin of upper eleven ribs –DA- superior border of rib below, A- with first rib fixed by scalene, pulls ribs toward one another to elevate the rib cage. I- Intercostal nerves (T1-T11) internal intercostals- PA- ridge of inner surface of ribs and corresponding costal cartilage, DA- superior border of rib below, A- draws rib together and depress rib cage-I- Intercostal nerves(T1-T11)
- The last piercing would be the pleura of the thoracic cavity. Ouch!

Serratus posterior superior- PA- Nuchal ligament, spinous processes of C7 to T3 vertebrae DA- Superior borders of 2nd to 4th ribs, Innervation-2nd to 5th intercostal nerves A- elevate ribs
Serratus posterior inferior- PA- spinous processes of T11 to L2 vertebrae, DA- Inferior borders of 8th 12th ribs near their angles Innervation- Anterior rami of T9 to T12 thoracic spinal nerves A-depress ribs(controversial)
Levator costarum- PA- Transverse processes of T7-11 , DA- Subjacent ribs between tubercle and angle, I- Posterior primary rami of C8-T11 nerves-A- elevate ribs
Scalene anterior-PA- Anterior tubercle of the transverse processes of C3-6, DA- scalene tubercle on the inner border and upper surface of 1rib , I- ventral rami of fourth thru sixth cervical nerves. A- assists in the elevation of the first rib
Scalene Medius- PA- front of the posterior tubercles of the transvers processes of C2-C7, DA- upper surface of the first rib, A- acting from above it helps raise the first rib, I- Ventral rami of C4-C8
Scalene Posterior- PA- Posterior tubercles of the transverse processes of 4C-6C , DA- outer surface of second rib, A- raises 2nd rib, I- Ventral rami of C6-C8

Expiration Inspiration
Serratus Posterior Inferior Serratus Posterior Superior
Internal Intercostal muscles Pectoralis Major and Minor
External Oblique Serratus Anterior
Transverse Abdominus Scalene Muscles
Transverse Thoracic muscles Levator Costarum External Intercostal Muscles

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