Items tagged “muscle”
45 results found
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
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
Flexor digitorum superficialis muscle
Flexor digitorum superficialis (FDS) muscle, also known as flexor digitorum sublimis muscle, is a muscle in the second (intermediate) layer of the anterior compartment of the forearm. It splits into four tendons, passes through the carpal tunnel under the flexor retinaculum. At the level of the ...
Article
Flexor digitorum profundus muscle
The flexor digitorum profundus (FDP) muscle makes up the third layer of the anterior compartment of the forearm along with the flexor pollicis longus muscle. It passes through the carpal tunnel and is one of the extrinsic muscles of the hand. The flexor digitorum profundus muscle is considered a...
Article
Flexor pollicis longus muscle
The flexor pollicis longus (FPL) muscle is one of the two muscles that make up the third layer of the anterior compartment of the forearm, along with the flexor digitorum profundus muscle. It is a deep muscle under the abductor pollicis brevis muscle. It passes through the carpal tunnel. It is o...
Article
Pronator quadratus muscle
Pronator quadratus muscle is the most distal muscle that makes up the deepest layer of the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand.
Summary
origin: anterior surface of distal quarter of ulnar shaft
insertion: anterior surface of distal quarter of ra...
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...
Case
Subtle gluteal atrophy
Published
15 Jul 2013
56% complete
MRI
Case
Rhabdomyosarcoma (thumb)
Published
15 Jul 2013
83% complete
MRI
Case
Infantile fibrosarcoma
Published
15 Jul 2013
86% complete
MRI
Case
Partial extensor forearm atrophy
Published
15 Jul 2013
39% complete
MRI
Case
Dermatomyositis
Published
16 Jul 2013
77% complete
MRI
Case
Intramuscular hemangioma
Published
26 Jul 2013
80% complete
MRI
Ultrasound
Article
Abductor pollicis longus muscle
The abductor pollicis longus (APL) muscle is found in the deep layer of the posterior compartment of the forearm. As it descends, it becomes superficial and passes under the extensor retinaculum and through the 1st extensor compartment of the wrist before attaching distally. It is one of the ext...
Article
Abductor pollicis brevis muscle
The abductor pollicis brevis muscle is a thin subcutaneous muscle located laterally in the thenar eminence of the hand, and is one of the intrinsic muscles of the hand.
Summary
origin: mainly from the flexor retinaculum
few fibers originate from the tubercles of scaphoid and trapezium and ten...
Article
Opponens pollicis muscle
The opponens pollicis muscle is one of the muscles of the thenar eminence, deep to abductor pollicis brevis, and is one of the intrinsic muscles of the hand. The three muscles that constitute the thenar eminence muscle group are abductor pollicis brevis, flexor pollicis brevis and opponens polli...
Article
Platysma muscle
The platysma muscle (a.k.a. the shaving muscle) is a broad superficial fascial sheet of thin muscle covering the superior anterior chest, anterior and anterolateral neck and anterolateral mandibular region.
Gross anatomy
The muscle consists of three parts: pars mandibularis, pars labialis and ...
Article
Depressor anguli oris muscle
The depressor anguli oris muscle (also known as the triangularis muscle) is one of the facial muscles.
Summary
origin: oblique line of the mandible
insertion:
modiolus at the angle of the mouth
superficial fibers from both sides merge to form the transversus menti
innervation: facial ner...
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