What is the insertion of the LAT?
The lateral aspect of the latissimus dorsi muscle builds the posterior border of the axilla. It is felt to contract during resisted adduction of the arm. Its insertion lies anteriorly at the crest of the lesser tuberosity.
What is latissimus dorsi origin?
Latissimus dorsi muscle
| Origin | Vertebral part: Spinous processes of vertebrae T7-T12, Thoracolumbar fascia Iliac part: Posterior third of crest of ilium Costal part: Ribs 9-12 Scapular part: Inferior angle of scapula |
|---|---|
| Functions | Shoulder joint: Arm internal rotation, Arm adduction, Arm extension; Assists in respiration |
What is the origin and insertion of the latissimus dorsi quizlet?
What is the origin of the Latissimus dorsi muscle? SP’s of T6 to sacrum, iliac crest, inferior 4 ribs (and inferior angle of scapula?) What is the insertion of the Latissimus dorsi muscle? crest of lesser tubercle of humerus and floor of intertubercular groove.
Where do your lats insert?
As the muscle fibers of the lats extend from the origin to the insertion point (the insertion for the lats is located on the inner aspect of your upper arm bone, just below the shoulder joint) they taper into a point.
What is the origin insertion and action of the serratus anterior?
The serratus anterior (SA) is a fan-shaped muscle that originates on the superolateral surfaces of the first to eighth or ninth ribs at the lateral wall of the thorax and inserts along the superior angle, medial border, and inferior angle of the scapula.
What is the origin and insertion of the supraspinatus muscle?
Supraspinatus is located deep to the trapezius muscle in the posterior scapular region, extending from the supraspinous fossa of scapula to the proximal humerus….Supraspinatus muscle.
| Origin | Supraspinous fossa of scapula |
|---|---|
| Insertion | Greater tubercle of humerus |
What is the insertion of the infraspinatus?
The infraspinatus has actions on the head of the humerus. The infraspinatus insertion at the middle facet of the glenoid tubercle allows it to exert a lateral or external rotational force. This force is synergistic with the teres minor, as it inserts on the inferior facet of the glenoid tubercle.
What is the origin and insertion of the biceps brachii muscle?
The biceps brachii muscle is one of the chief muscles of the arm. The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm.
Where are lats located?
back
The latissimus dorsi is a large, flat muscle covering the width of the middle and lower back. It connects the bone of the upper arm to the spine and the hip. This muscle is often referred to as the lats.
What is the function of the latissimus dorsi?
Latissimus dorsi works collaboratively with the teres major and pectoralis major to perform actions of the upper extremity. Together, these muscles will work to adduct, medially rotate and extend the arm at the glenohumeral joint.
What is origin insertion and action of a muscle?
A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.