Items tagged “muscle”
43 results found
The piriformis muscle is a muscle in the gluteal region of the lower limb. Summary origin: sacrum course: exits the pelvis through the greater sciatic foramen insertion: greater trochanter of the femur action: abduction and lateral rotation of the thigh arterial supply superior gluteal ar...
Muscles of the shoulder
Muscles of the shoulder can be subdivided into a variety of groups depending on origin, topography, function or innervation. The system used here groups muscles based on function and topography (which are closely related in the upper limb): Muscles of the shoulder girdle Muscles that have migr...
Supraspinatus is one of the four muscles that make up the rotator cuff, the others being: infraspinatus, teres minor and subscapularis. Summary origin: supraspinous fossa of the scapula insertion: greater tubercle of the humerus innervation: suprascapular nerve (C5-6) arterial supply: supra...
The Infraspinatus muscle is one of the four muscles that make up the rotator cuff, the others being: supraspinatus, teres minor and subscapularis. origin: infraspinatus fossa of the scapula insertion: greater tubercle of the humerus innervation: suprascapular nerve (C5-6) arterial supply: su...
Biceps femoris muscle
The biceps femoris is one of the large muscles in the posterior compartment of the thigh and a component of the hamstrings. It has a long and a short head, each with different functions and innervation. Summary origin long head: medial facet of the ischial tuberosity short head: lateral line...
Lateral rectus muscle
The lateral rectus muscle is one of the 6 extraocular muscles that control eye movements. It is responsible for abduction and is the only muscle that is innervated by the abducens nerve (CN VI). It should normally measure 2.9 ± 0.6 mm. Summary innervation: abducens nerve (CN VI) origin: annul...
The sternocleidomastoid (SCM) is a muscle of the neck. It has two heads that meld to form one insertion. SCM, along with the trapezius muscle, is invested by the superficial layer of the deep cervical fascia, which splits around it. SCM divides the neck into anatomical anterior and posterior tri...
Anconeus epitrochlearis is an accessory muscle at the medial aspect of the elbow. It is also known as the accessory anconeus muscle and should not be confused with the anconeus muscle which is present at the lateral aspect of the elbow. Epidemiology The muscle may be unilateral but has been f...
The pectoralis major muscle is a muscle of the pectoral region, overlying the anterior chest wall but is considered an upper limb muscle due to its function. Summary origin sternal part: sternum and superior six costal cartilages clavicular part: medial half of the clavicle insertion: late...
Psoas muscle hemangioma
Diagnosis almost certain
Published 31 Jan 2012
Ganglion cysts of the distal vastus lateralis compartment
Diagnosis almost certain
Published 29 Mar 2012
The deltoid muscle (also known as deltoideus) is the largest of the shoulder muscles. The muscle is composed of three heads (clavicular, acromial and spinous), although electromyography suggests that there are at least seven control regions that could act independently 1. Summary origin: later...
Teres major is one of the seven scapulohumeral muscles that act around the glenohumeral joint to facilitate shoulder movement. Summary origin: caudal two thirds of lateral border and inferior angle of scapula insertion: medial border of the intertubercular groove, which is the crest of lesser...
The coracobrachialis is one of the three muscles of the anterior compartment of the arm. It sits beneath the biceps brachii, inserting via a flat tendon into the medial shaft of the humerus. origin: coracoid process of scapula insertion: via a flat tendon onto the midportion of the medial surf...
The triceps brachii, which 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, medial intermuscular septum late...
The anconeus is a small muscle in the posterior compartment of the arm at the lateral aspect of the elbow. It has little functional significance but should be differentiated from the variably present anconeus epitrochlearis at the medial aspect of the elbow. Summary origin: lateral epicondyle ...
The articularis cubiti is a muscle 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
Pronator teres 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 radius ar...
Flexor carpi radialis
Flexor carpi radialis (FCR) is a muscle found in the first layer of the anterior compartment of the forearm. It does not pass through the carpal tunnel, but rather by itself in a small separate tunnel between the superficial and deep layers of the flexor retinaculum along the scaphoid and trapez...
Palmaris longus (PL) 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 artery ...