Latissimus dorsi (lat) is a large, flat triangular muscle which is also the widest muscle in the human body. It begins in the lower portion of the back and tapers as it ascends to a narrow tendon that attaches to the humerus anteriorly. Due to which the movements associated with this muscle include extension, adduction [...]
The labia are the inner and outer folds of the vulva, which are present at both sides of the vagina. They are part of the female genitals and are the visible portion of the vulva. In humans, labia majora and labia minora form the two pairs of labia. The labia majora, being the outer labia or outer [...]
The levator scapulae muscle is an elongated muscle present in the shoulder girdle. It acts as a connection between the upper limb and the vertebral column and can be located in the posterior triangle of the neck. Sternocleidomastoid covers the superior aspect of the levator scapulae whereas its inferior part is covered by trapezius and by its [...]
Iliopsoas muscle is formed by the combination of two muscles: Psoas major and iliacus muscle of hip. As these muscles are closely related in function and structure that they are seen as a single muscle, iliopsoas muscle. Like the psoas major muscle, the iliacus flexes the thigh at the hip joint when the trunk is [...]
The spinal cord supplies origin to 31 pairs of spinal nerves. Each and every muscle in the body is supplied by one or more spinal nerves. Myotomes is said to be a portion of skeletal muscles which is innervated by a single spinal cord level. In simple words myotome is defined as a group of [...]
Anatomy of the Elbow Joint The three bones that are responsible for the formation of the elbow joint are humerus, radius and ulna. It includes two articulations: (a) humero-ulnar articulation, between the trochlea of the humerus and trochlear notch of the ulna, and (b) humero-radial articulation, between the capitulum of the humerus and the head [...]
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 [...]
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 also helps in maintaining static posture and arm-swinging. [...]