Table of Contents
What goes through Intertubercular sulcus?
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 holds the biceps tendon in the Intertubercular sulcus?
Below the bicipital groove, the tendon is held in place by the tendon of pectoralis major. The bicipital groove (intertubercular groove or sulcus) lies between the lateral edge of the lesser tuberosity medially and the greater tuberosity laterally.
What muscles attach to Bicipital groove?
Teres major attaches to medial lip of groove. Pectoralis major to lateral lip of groove. Latissimus (Lady) is on floor of groove, between the 2 majors.
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) |
What is the Intertubercular groove?
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 muscles attach to the Intertubercular groove?
The intertubercular sulcus is the site of three important muscle attachments:
- Pectoralis major.
- Latissmus dorsi.
- Teres major.
What muscle attaches to the intertubercular sulcus of the humerus?
biceps brachii muscle
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….
| Bicipital groove | |
|---|---|
| FMA | 23396 |
| Anatomical terms of bone |
Which muscle inserts at the Intertubercular sulcus of the humerus and is innervated by the lower Subscapular nerve?
Where do the lats attach?
Latissimus dorsi muscle
| Latissimus dorsi | |
|---|---|
| Origin | Spinous processes of vertebrae T7-L5, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula |
| Insertion | Floor of intertubercular groove of the humerus |
| Artery | Thoracodorsal branch of the subscapular artery |
| Nerve | Thoracodorsal nerve (C6, C7, C8) |
Where does Brachioradialis attach?
Brachioradialis muscle
| Origin | Lateral supracondylar ridge of humerus, lateral intermuscular septum of arm |
|---|---|
| Insertion | (Proximal to) styloid process of radius |
| Action | Elbow joint: Forearm flexion (when semi pronated) |
| Innervation | Radial nerve (C5-C6) |
| Blood supply | Radial artery, radial recurrent arteries, radial collateral artery |
What does teres major attach?
scapula
The teres major is a thick muscle of the shoulder joint. It spans from the inferior aspect of the scapula to the proximal part of the humeral shaft….Teres major muscle.
| Origins | Inferior angle and lower part of the lateral border of the scapula |
|---|---|
| Insertions | Intertubercular sulcus (medial lip) of the humerus |
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.