Showing results for "shoulder"

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C

Coracobrachialis

...the medial aspect of the humerus shaft (at the level of the deltoid tubercle). Function: Flexion of the arm at the shoulder. It is also a weak adductor at the...

T

Trapezius

The trapezius is an extrinsic muscle of the shoulder. It is a broad, flat and triangular shape – forming a trapezoid shape in combination with the contralateral side. Attachments: Originates...

The Cranial Nerves

The Accessory Nerve (CN XI)

...to rotate their head and shrug their shoulders, both normally and against resistance. Simply observing the patient may also reveal signs of muscle wasting in the sternocleidomastoid and trapezius in...

L

Latissimus Dorsi

The latissimus dorsi is an extrinsic muscle of the shoulder. Attachments: Originates from the spinous processes of T7-T12, iliac crest, thoracolumbar fascia and the inferior three ribs. The fibres converge...

T

Thoracoacromial Artery

The thoracoacromial artery (thoracoacromial trunk) is a short branch of the axillary artery. It contributes to the blood supply of the shoulder and pectoral region. Course The thoracoacromial artery arises...

Nerves of the Upper Limb

The Brachial Plexus

...suprascapular, and nerve to subclavius. Muscles affected – supraspinatus, infraspinatus, subclavius, biceps brachii, brachialis, coracobrachialis, deltoid and teres minor. Motor functions affected – abduction at shoulder, lateral rotation of arm,...

T

Teres Minor

The teres minor is an intrinsic muscle of the shoulder region. It is part of the rotator cuff muscle group. Attachments: Originates from the posterior surface of the scapula, adjacent...

S

Subscapularis

The subscapularis is an intrinsic muscle of the shoulder region. It is part of the rotator cuff muscle group. Attachments: Originates from the subscapular fossa (anterior surface of the scapula)....

R

Rhomboid Major

The rhomboid major is an extrinsic muscle of the shoulder. It is located deep to the trapezius, and inferior to the rhomboid minor. Attachments: Originates from the spinous processes of...

R

Rhomboid Minor

The rhomboid minor is an extrinsic muscle of the shoulder. It is located deep to the trapezius, and superior to the rhomboid major. Attachments: Originates from the spinous processes of...

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