What is the origin of the latissimus dorsi muscle quizlet?
The latissimus dorsi muscle originates on the: posterior crest of the ilium.
Where is the insertion of the lats?
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 are the attachment of the latissimus dorsi?
The muscle has attachments to the lower six vertebral spinous processes anterior to the attachment of the trapezius on the spinous processes. Through the thoracolumbar fascia latissimus dorsi attaches to the lumbar and sacral spinous processes (T6 to S5 levels), and the supraspinous ligament.
Are the origins of the deltoid and latissimus dorsi?
It completely surrounds the shoulder joint from the front, to the back. It arises from the spine of the scapula, from the acromion, and from the lateral third of the clavicle. It’s inserted here on the deltoid tuberosity of the humerus.
What is the origin of the pectoralis major?
Pectoralis major muscle
| Pectoralis major | |
|---|---|
| Pronunciation | /ˌpɛktəˈreɪlɪs ˈmeɪdʒər/ |
| Origin | Clavicular head: anterior surface of the medial half of the clavicle. Sternocostal head: anterior surface of the sternum, the superior six costal cartilages, and the aponeurosis of the external oblique muscle |
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.
What is the origin and insertion of the pectoralis major?
The pectoralis major has a broad origin, based on which it is divided into three parts: clavicular part, sternocostal part and abdominal part. All three parts converge laterally and insert onto the greater tubercle of humerus.
What is the origin and insertion of the infraspinatus?
Infraspinatus is a thick triangular muscle that occupies the majority of the dorsal surface of the scapula….Infraspinatus muscle.
| Origin | Infraspinous fossa of scapula |
|---|---|
| Insertion | Greater tubercle of humerus |
| Action | Shoulder joint: Arm external rotation; Stabilizes humeral head in glenoid cavity |
What is the origin insertion and action of the pectoralis major?
Pectoralis major muscle
| Origin | Clavicular part: anterior surface of medial half of clavicle Sternocostal part: anterior surface of sternum, Costal cartilages of ribs 1-6 Abdominal part: Anterior layer of rectus sheath |
|---|---|
| Insertion | Crest of greater tubercle of humerus |