Items tagged “illustrations”
49 results found
Article
Brachialis muscle
The brachialis muscle is one of the three muscles of the anterior compartment of the upper arm. Unlike biceps brachii (which is also a supinator) it acts only to flex the elbow. Isolated brachialis injuries are rare.
Summary
Brachialis has a large superficial head and a smaller deep head.
Th...
Article
Triceps brachii muscle
The triceps brachii muscle, often referred to simply as the triceps, is a three-headed muscle in the posterior compartment of the arm.
Summary
origin
long head: infraglenoid tubercle of the scapula
medial head: posterior humerus inferior to the radial groove, both intermuscular septa
latera...
Article
Anconeus muscle
The anconeus muscle is a small muscle in the posterior compartment of the arm at the lateral aspect of the elbow. Its functional significance is not well understood 5.
It should not be confused with the anconeus epitrochlearis, an accessory muscle that is present in up to one third of people, a...
Article
Articularis cubiti muscle
The articularis cubiti muscle lies in the posterior compartment of the arm:
origin: posterior surface of the distal humerus
insertion: posterior surface of the elbow joint capsule
innervation: radial nerve
action: tenses the posterior elbow joint capsule during elbow extension
Article
Pronator teres muscle
Pronator teres muscle is a two-headed flexor and pronator of the forearm, found superficially in the anterior compartment of the forearm.
Summary
origin
humeral head: medial epicondyle of the humerus
ulnar head: coronoid process of the ulna
insertion: lateral surface of the middle-third rad...
Article
Flexor carpi radialis muscle
Flexor carpi radialis (FCR) is found in the first layer of the anterior compartment of the forearm and is one of the extrinsic muscles of the hand. It does not pass through the carpal tunnel, but rather by itself in a small separate FCR tunnel.
Summary
origin: medial epicondyle of the humer...
Article
Palmaris longus muscle
Palmaris longus (PL) muscle is a superficial, weak flexor of the wrist located in the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand.
Summary
origin: medial epicondyle of the humerus
insertion: palmar aponeurosis
arterial supply: anterior ulnar recurrent ...
Article
Latissimus dorsi muscle
Latissimus dorsi muscle (plural: latissimi dorsi muscles, and colloquially often shortened to the lats) is one of the muscles that attaches the upper limb to the vertebral column.
Summary
origin
spinous processes of T7-T12 vertebrae and thoracolumbar fascia
posterior third of the iliac cres...
Article
Levator scapulae muscle
Levator scapulae muscle is a muscle of the upper limb that connects the pectoral girdle to the cervical spine.
Summary
origin: C1-C4 transverse processes
insertion: superior angle of the scapula
innervation: direct branches from the C3-4 spinal nerves, and the dorsal scapular nerve (C5)
art...
Article
Pectoralis minor muscle
The pectoralis minor muscle is a muscle of the pectoral region lying deep to and completely covered by the pectoralis major muscle.
It is an important anatomical landmark in two senses:
it arbitrarily divides the axillary artery into 3 parts
it arbitrarily divides the axillary lymph nodes in...
Article
Serratus anterior muscle
Serratus anterior muscle is one of the four muscles of the pectoral region.
Summary
origin: lateral surface of 1st to 8th or 9th ribs
insertion: medial border of the scapula
innervation: long thoracic nerve
action:
draws the scapula anteriorly against the chest wal...
Article
Subclavius muscle
The subclavius muscle is a small triangular muscle of the pectoral region which depresses the shoulder.
Summary
origin: 1st costochondral joint
insertion: subclavian groove on the inferior aspect of the middle third of the clavicle
innervation: nerve to subclavius
arterial supply: clavicula...
Article
Flexor carpi ulnaris muscle
Flexor carpi ulnaris (FCU) muscle is of the first layer of the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand.
Summary
origin
humeral head: medial epicondyle of the humerus
ulnar head: aponeurosis from medial olecranon and upper three quarters subcutaneou...
Article
Posterior compartment of the forearm
The forearm is divided into the posterior compartment and the anterior compartment by the deep fascia, lateral intermuscular septum and the interosseous membrane between the ulna and radius.
Muscles
The posterior compartment of the forearm contains 11 muscles, divided into deep and superficia...
Article
Flexor retinaculum (ankle)
The flexor retinaculum at the ankle is formed by reinforcement of the deep fascia of the leg by transverse collagen bundles and functions to prevent 'bowstringing' of tendons as they pass the tibiotalar joint. It forms the roof of the tarsal tunnel 1-2.
Attachments
medial malleolus of the tibi...
Article
McBurney point
McBurney point is defined as a point that lies one-third of the distance laterally on a line drawn from the umbilicus to the right anterior superior iliac spine. Classically, it corresponds to the location of the base of the appendix 1.
Clinically, McBurney point is relevant for the elicitation...
Article
Femoral triangle
The femoral triangle is an anatomical space in the anterior upper thigh that contains several palpable structures.
Gross anatomy
Boundaries
The major boundaries can be recalled with the mnemonic SAIL 1,2:
lateral border: medial border of sartorius
medial border: medial border of adductor lo...
Case
Iliotibial band (ITB) anatomy: diagrams
Published
21 May 2015
22% complete
Diagram
Case
Hill-Sachs lesion - illustration
Published
23 Jan 2019
41% complete
Diagram
Case
Menisci illustrations
Published
11 May 2019
20% complete
Diagram
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