Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== CHEST ====== <a2s> .--------------------------. | ROOF | | | .------------+-------------. | | .------------------------+------------------------. | | | .----------------------------------. | | | | | .----------. | | .------------. .-----------. | | .------------. | | | | | | | | | | | | | |----+ | | | | | | +------| | | BACK | | | | LEFT | | RIGHT | | | | FRONT | .----------. | | .------------. .-----------. | | .------------. | | | | | .----------------------------------. | | | .------------------------+------------------------. | | .---------+--------------. | | | FLOOR | .------------------------. </a2s> * [[en:Mediastinum|mediastinum]] Trunk Upper part of trunk being called Chest Chest walls More general Skin Superficial fascia Deep fascia Extrinsic muscles More front Pectoralis major Pectoralis minor More lateral Serratus anterior More back Rhomboid Major Minor Serratus posterior Superior Inferior Levator scapulae More particular Framework Front chest Sternum Side chest Ribs Back chest Thoracic vertebra Thoracic wall proper Ribs Spaces between ribs Intercostal space Anteriorly 9 intercostal spaces Posterior 11 intercostal spaces Intercostal muscles External intercostal From Posteriorly tubercle of rib to Continuous with posterior fibres of superior costotransverse ligament costochondral junction External or anterior intercostal membrane Fibres direction Downward , forward and medially Internal intercostal From Lateral border of sternum Superior costotransverse ligament To Angle of rib Continuous with internal intercostal membrane Fibres Backwards , laterally Transversria thoracis Parts Subcostalis Intercostalis intimi Sternocostalis Nerve supply Intercostal nerves Anterior primary Rami of t1 to t11 Upper two supply upper limb Lower 5 supply abdominal wall Anterior primary Rami of t12 forms Subcostal nerve Course Runs in costal groove Ends near sternum Relations Passes below Neck of rib Costal groove Lies below posterior intercostal vessels Above downwards VAN posterior part of groove Nerve lies beneath pleura With endothoracic fascia and internal intercostal membrane Near sternum Nerve crosses infront of internal thoracic artery And sternocostalis muscle Pierces External and internal intercostal muscle Branches Muscular branches Sensory branches Lateral cutaneous branch. Anterior cutaneous branch Intercostal arteries Each intercostal space has a artery Posterior intercostal arteries First and second arise from superior intercostal artery Which arises from costocervical trunk of subclavian artery 3- 11 arise from descendng thoracic aorta Course and relations Actions of intercostal muscles Chest cavity en/thorax.txt Last modified: 2024/08/31 13:50by 127.0.0.1