Subscapularis Muscle Anatomy The subscapularis muscle forms the largest component of posterior wall of the axilla and this muscle is covered by a dense membrane (dense fascia) which is attached to the scapula at the margins of its origin. Subscapularis is part of the SITS muscles or the rotator cuff muscles of which their primary function …
Housemanship or House Job or Internship as some people call it is the training program that newly inducted Doctors normally go through, immediately after graduating from medical school before starting their residency or before being given permanent license. I will be discussing on Housemanship training in Nigeria. Who is a House Officer? …
Brachial Plexus Anatomy Brachial plexus is a major network of nerves that innervate or supply the upper limbs – most nerves in the upper limb arise from the brachial plexus; there is one brachial plexus on the left and another on the right, both supplying the two upper limbs. The Brachial plexus …
The Trapezius is part of the superficial posterior thoracoappendicular muscles (which are the extrinsic shoulder muscles) and the left and right Trapezius muscles form a diamond shape or Trapezoid shape from which the muscle got its name. The Trapezius is a large flat muscle and the most superficial of the upper part …
The Deltoid is a powerful and triangular muscle located at the shoulder region; as the name implies, the deltoid has the shape of an inverted Delta of the Greek alphabets; the deltoid is part of the six scapulohumeral muscles that pass from the scapula to the humerus and act on the shoulder …
Supraspinatus Action The Supraspinatus muscle helps to initiate the abduction of the arm before the Deltoid muscle takes over. The supraspinatus also supports the head of the humerus against the glenoid cavity and therefore gives the joint stability during movement caused by actions of other muscles such as the deltoid. Supraspinatus Origin and Insertion …
Infraspinatus Muscle Anatomy The infraspinatus is a muscle of the scapulohumeral region that is also part of the SITS muscles or the Rotator cuff muscles. The infraspinatus located medially in the infraspinous fossa of the posterior aspect of the scapula and occupying three quarters of the infraspinous fossa. The infraspinatus is partly …
Teres Major Origin and Insertion The Teres major is a broad and cord-like muscle that originates from an oval area on the dorsal surface of the inferior angle of the scapula and passes upwards and laterally to end as a flat tendon that is inserted into the medial lip of the intertubercular …