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Muscles

Teres Major

Teres major is a thick and oval-shaped muscle that lies in the upper arm. Although having similar names, Teres major is different in terms of actions and innervation when compared to the teres minor. It’s main function is to facilitate medial rotation of the arm and it

The Pectoral Region – Muscles

The muscles of the Pectoral Region are: Pectoralis major Pectoralis minor Subclavius Serratus anterior Muscles of the Pectoral Region The Pectoral region is the one located on the anterior chest wall. Pectoralis Major Pectoralis major is the largest muscle of the pectoral region. Origin Pectoralis major muscle

Lower Esophageal Sphincter (Gastroesophageal Sphincter)

Sphincters protect the esophagus at both terminations. The upper esophageal sphincter is the pharyngoesophageal sphincter, and the lower esophageal sphincter is the gastroesophageal sphincter. A sphincter is a ring-like muscular structure that, whenever closed, stops the passage via the tube that it is protecting. The lower portion

Intercostal Muscles

Within each intercostal space, the intercostal muscles are three flat muscles found that pass between adjacent ribs. External Intercostal Muscles They originate superiorly to inferior margin of rib above and insert inferiorly to the superior margin of the rib below and are innervated by intercostal nerves having

Internal Intercostal Muscles

The internal intercostal muscles are a set of skeletal muscles and are located between the ribs. There are eleven muscles on each side. Among the cartilages of the true ribs they begin anteriorly at the sternum in the intercostal spaces, as well as at the anterior extremities

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