What is the function of the Intertubercular sulcus?
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What is the function of the Intertubercular sulcus?
Anatomical terms of bone The bicipital groove (intertubercular groove, sulcus intertubercularis) is a deep groove on the humerus that separates the greater tubercle from the lesser tubercle. It allows for the long tendon of the biceps brachii muscle to pass.
What muscles attach at the Intertubercular sulcus?
The intertubercular sulcus is the site of three important muscle attachments:
- Pectoralis major.
- Latissmus dorsi.
- Teres major.
Where is the Intertubercular sulcus?
humerus
The bicipital groove (also known as the intertubercular sulcus or sulcus intertubercularis) is the indentation between the greater and lesser tuberosities of the humerus that lodges the biceps tendon.
What passes through the Intertubercular sulcus of the humerus?
Fibrocartilage lines the intertubercular sulcus of the humerus and protects both the bone and the tendon of the long head of biceps brachii where the tendon passes through the sulcus. It provides a smooth, resilient, lubricated gliding surface on the bone.
What nerve runs through Intertubercular groove?
The bicipital groove (intertubercular groove or sulcus) lies between the lateral edge of the lesser tuberosity medially and the greater tuberosity laterally. It is converted to a tunnel by the transverse humeral ligament, a thick band uniting the bony margins. . Musculocutaneous nerve (C5, 6 ).
Which muscle inserts at the Intertubercular sulcus of the humerus and is innervated by the lower Subscapular nerve?
| Teres major muscle | |
|---|---|
| Origin | Posterior aspect of the inferior angle of the scapula |
| Insertion | Medial lip of the intertubercular sulcus of the humerus |
| Artery | Subscapular and circumflex scapular arteries |
| Nerve | Lower subscapular nerve (segmental levels C5 and C6) |
How do you palpate an Intertubercular groove?
Place your index finger on one tubercle and the ring finger of the same hand on the other tubercle. The middle finger of the same hand is placed in between the other two fingers to palpate the area of the biciptal groove. The tendon of the long head of the biceps brachii is located in this groove.
What muscle is inserted on the lateral ridge of the Intertubercular groove of the humerus?
Pectoralis major, teres major and latissimus dorsi insert on the lips of the intertubercular sulcus. This can be remembered with the mnemonic “a lady between two majors”, with latissimus dorsi attaching between teres major on the medial lip and pectoralis major laterally.
What is upper limb function?
The primary purpose of the upper limb is to move the hand around the body during the activities of life. The shoulder girdle provides a wide range of motion—exceeding a hemisphere–so that the hand may reach in all directions.
What is the function of the teres minor?
The teres minor is deep to the deltoid muscle. As a rotator cuff muscle, the teres minor stabilizes the ball-and-socket glenohumeral joint by helping hold the humeral head (ball) into the shallow glenoid cavity of the scapula (socket). The teres minor also laterally, or externally, rotate the arm at the shoulder joint.