Shoulder region - muscle origins and insertions

Question 1

Latissmus dorsi
(origins and insertions)
(intrinsic muscle)

Answer 1

Origin: Spinous process of T7-T12, L1-L5, and the sacrum, thoracolumbar fascia; inferior portion of the scapula; posterior third of the illiac crest; ribs 9-12.
Insertion: Intertubercular groove of the humerus.

Question 2

Trapezius
(origins and Insertions)
(intrinsic muscle)

Answer 2

Origin: occipital bone; ligamentum nuchae; spinous process of T1-T12
Insertion: Scapular spine to the acromion to the lateral third of the clavicle.

Question 3

Levator Scapulae
(origin and insertions)
(intrinsic muscle)

Answer 3

Origin: Transverse process of C1-C4.
Insertion: Superior part of medial (spinal) boarder of the scapula.

Question 4

Rhomboids major
(origin and insertions)
(intrinsic muscle)

Answer 4

origin: spinous process of c1-c4
insertion: superior part of medial (spinal) boarder of the scapula

Question 5

Teres major
(origin and insertion)
(extrinsic muscle)

Answer 5

origin: inferior angle of the humerus.
Insertion: intertubucular groove of the humerus

Question 5

Rhomboids minor
(origin and insertion)
(intrinsic muscle)

Answer 5

origin: spinous processes of c7-t1
insertion: Medial (vertebral) boarder of scapula above scapula spine

Question 5

Deltoid (anterior head, clavicle portion)
(origin and insertion)
(extrinsic muscle)

Answer 5

origin: lateral third of clavicle
insertion: deltoid tuberosity of the lateral side of the body of humerus

Question 5

Supraspinatus
(origin and insertion)
(extrinsic muscle)

Answer 5

origin: the greater tubercle of the humerus

Question 5

Deltoid (medial head, acromial)
(origin and insertion)
(extrinsic muscle)

Answer 5

origin: acromion
insertion: deltoid tuberosity of lateral side of the humerus

Question 5

Deltoid (posterior head, spinal)
(origin and insertion)
(extrinsic muscle)

Answer 5

origin: scapular spine
insertion: deltoid tuberosity of the lateral side of the humerus

Question 6

Infraspinatus
(origin and insertion)
(extrinsic muscle)

Answer 6

origin: infraspinatus fossa on posterior surface of the scapulae
insertion: greater tubercle of the humerus.

Question 7

Subscapularis
(origin and insertion)
(extrinsic muscle)

Answer 7

origin: subscapular fossa
insertion: lesser tubercle of the humerus.

Question 8

Teres minor
(origin and insertion)
(extrinsic muscle)

Answer 8

origin: lateral boarder of the scapula
insertion: greater tuberosity of the humerus