The infraspinatus is a thick triangular muscle, which occupies most of the infraspinous fossa. It is among the four Rotator Cuff muscles acting as the mechanical link between the posterosuperior and anterior parts of the rotator cuff. Origin of Infraspinatus Muscle Infraspinatus muscle originates from the medial two-thirds of the infraspinatous fossa by tendinous fibres from [...]
The pronator teres muscle is found on the palmar side of the forearm, below the elbow. It is assisted by the pronator quadratus to perform its major role i.e, to rotate the forearm palm-down. This position is also referred to as pronation. Origin of Pronator Teres Muscle The pronator teres muscle originates from two heads: A superficial head [...]
Teres minor is among the four muscles that contribute to the making of the Rotator Cuff. Its shape is long and narrow and sometimes it may blend into infraspinatus. The primary function of teres minor is to keep the humerus steady in the glenoid fossa in the shoulder movement. Origin The Teres minor [...]
The flexor pollicis longus muscle starts from the surrounding half of the anterior side of the interosseous membrane along with the anterior side of the radius. Through upper two-third of the anterior side of the radius under the anterior oblique line and attaching part of the interosseous membrane. Flexor Pollicis Longus [...]
The muscles of the posterior of the forearm are categorized into two classes: superficial deep The muscles that form the back of the forearm are commonly known as Extensor Muscles. These are provided by the radial nerve. Superficial Muscles of the back of Forearm The superficial muscles of the back of forearm are [...]
The abductor pollicis longus muscle emerges via the associated interosseous membrane and the proximal posterior sides of the radius as well as the ulna. Abductor pollicis longus arises in between the extensor digitorum along with extensor carpi radialis brevis muscles within the distal forearm, in order to create a tendon that enters the thumb and attaches [...]
Intrinsic Muscles of the Hand are short muscles whose origin and insertion is enclosed within the area of the hand. These muscles make possible the skilled movements of the hand and also help the hand in adjusting for proper gripping. There are 20 intrinsic muscles in hand. These muscles comprises of small motor units which [...]
Hand It emerges via the hook of the hamate bone as well as the surrounding flexor retinaculum and attaches along with the abductor digiti minimi muscle within the medial part of the base of the proximal phalanx of the little finger. The flexor digiti minimi brevis muscle is lateral towards the abductor digiti minimi. [...]
The Deltoid is a three-in-one muscle. It’s thick, powerful, and curved triangular muscle covering the shoulder and creating its rounded contour. The deltoid is shaped like the inverted Greek letter Delta (D), for this reason its name deltoid. The deltoid muscle is split into 3 parts: Anterior unipennate part. Posterior unipennate part. Middle multipennate part. [...]
As the name suggests, it has three heads. Triceps brachii is a large muscle, which creates the majority of (nearly 70%) of the matter on the back of arm. Triceps Brachii Origin Lateral Head Starting simply under the head of the humerus and ending nearly midway down the bone, and the [...]