CMD 272 Lecture Notes - Lecture 6: Inferior Vena Cava, Subcostal Nerve, Intercostal Nerves

• School: URI
• Department: Communicative Disorders
• Course: CMD 272
• Professor: Milner Bethany

Document Summary

Cmd 272 - lecture 6 - muscles for breathing. Provides attachment of the upper limbs to the torso. Made up of the scapula and the clavicle: Humerus of the upper arm articulates with the glenoid fossa of the scapula. Responsible for the lateral projection of the scapula past the chest wall. Proximal end rides on the upper-lateral margin of the scapula. Distal end crosses over rib 1 and articulates with the acromion of the scapula. Muscle activity depends on the overall activity. Primary/essential muscles participate fully in respiration. Accessory muscles help facilitate respiration but are not necessarily essential. Do not need abdominal muscles for inhalation. Edges attach to the inferior portions of the ribs, sternum, and vertebral column. Middle portion made up of aponeurosis called the central tendon. Central tendon is crescent-shaped with no contractile properties of its own. Central tendon provides a floor for the heart, which sits directly above it.