Anatomy

By Dr Paul Batman, PhD.

MUSCLE: SUPRASPINATUS

DESCRIPTION:

The supraspinatus is a small but powerful muscle situated on the top of the scapula and partially covered by the trapezius and the deltoid.

ORIGIN:

Supraspinous fossa of the scapula.

INSERTION:

Top of the greater tubercle and capsule of the shoulder joint.

MUSCLE GROUPS:

The supraspinatus belongs to the following muscle groups:

Shoulder […]

By Dr Paul Batman, PhD.

MUSCLE: SUBSCAPULARIS

DESCRIPTION:

The subscapularis is  named according to its position on the scapula. It runs in front of the scapula across the chest wall and attaches on the front of the humerus. Its tendon merges with the joint capsule of the shoulder joint  and helps stabilize it.

ORIGIN:

Subscapular fossa on the […]

By Dr Paul Batman, PhD.

MUSCLE: TERES MINOR and INFRASPINATUS

DESCRIPTION:

The teres minor is strongly linked with the infraspinatus and is located on the posterior aspect of the scapula. Both these muscles work together to produce the same actions at the shoulder joint.

ORIGIN:

Infraspinous fossa and lateral border of the scapula.

INSERTION:

Lateral posterior surface of the greater tubercle and […]

By Dr Paul Batman, PhD.

MUSCLE: TERES MAJOR

DESCRIPTION:

The teres major is a small round muscle that runs in the same direction as the latissimus dorsi and is often referred to as the “Lats little helper”.

ORIGIN:

Lower one third lateral border of the scapula.

INSERTION:

Medial lip bicipital groove of the humerus.

MUSCLE GROUPS:

The teres major […]

By Dr Paul Batman, PhD.https://drummondeducation.com/wp-admin/edit.php

MUSCLE: LATISSIMUS DORSI

DESCRIPTION:

The latissimus dorsi is a broad sheet of muscle commencing from a broad origin across the lower back converging to a small twisting insertion on the humerus.

ORIGIN:

Spinous processes of the lower 6 thoracic vertebrae, lumbar vertebrae, sacral vertebrae, posterior iliac crest, lower 4 ribs and the inferior angle of […]

By Dr Paul Batman, PhD.

MUSCLE: CORACOBRACHIALIS

DESCRIPTION:

The coracobrachialis is a small muscle located across the front of the shoulder and runs in a similar direction to the short head of the biceps. It is found between the anterior deltoid and pectoralis major.

ORIGIN:

Coracoid process

INSERTION:

Middle one third of the medial surface of the humerus.

MUSCLE GROUPS:

The […]

By Dr Paul Batman, PhD.

DESCRIPTION:

The deltoid is a large hooded multipennate muscle on the lateral aspect of the shoulder giving it a rounded appearance. It consists of three parts, an anterior, middle and a posterior.

ORIGIN:

Lateral one third clavicle, acromion process and the spine of the scapula.

INSERTION:

Deltoid tuberosity.

MUSCLE GROUPS.

The deltoid belongs to the […]

Article by Dr Paul Batman, PhD. 

The pectoralis major is a multi pennate muscle that is fan shaped in appearance and twists on itself at its insertion. The pectoralis major consists of 2 separate parts, a clavicular and sternal portion. The sternal part twists 180 degrees on its insertion.

ORIGIN:

Medial half of the clavicle, sternum and first […]