Items tagged “muscles”

17 results found
Article

Psoas major muscle

The psoas major muscle (usually shortened to just the psoas muscle) is one of the muscles of the posterior abdominal wall and lies not in the retroperitoneum but posterior to it, in the iliopsoas compartment. Summary origin: vertebral bodies, intervertebral discs and transverse processes of T1...
Article

Extraocular muscles

The extraocular muscles (EOMs) are the six skeletal muscles that insert onto the eye and hence control eye movements. Terminology The extraocular muscles maybe subdivided into the recti muscles and the oblique muscles. Action A summary of the principal actions of each muscle are given below....
Article

Ocular adductors

The ocular adductors are the extra-ocular muscles responsible of adduction of the globe: medial rectus (primary function) inferior rectus (tertiary function) superior rectus (tertiary function)
Article

Eye movements

Eye movements are a complex set of movements of the globe that are performed by the extraocular muscles. Although each of the muscles have different primary actions on the eye, they rarely act alone and most eye movements involve a combination of synergistic and antagonistic muscles 1. Abductio...
Article

Ocular abductors

The ocular abductors are the extra-ocular muscles responsible for abduction of the globe: lateral rectus (primary function) superior oblique (tertiary function) inferior oblique (tertiary function)
Article

Ocular elevators

The ocular elevators are the extra-ocular muscles responsible for elevation of the globe: superior rectus (primary function) inferior oblique (secondary function)
Article

Ocular internal rotators

The ocular internal (medial) rotators are the extra-ocular muscles responsible for internal rotation (intorsion) of the globe: superior oblique (primary function) superior rectus (secondary function)
Article

Ocular external rotators

The ocular external (lateral) rotators are the extra-ocular muscles responsible for external rotation (extorsion) of the globe: inferior oblique (primary function) inferior rectus (secondary function)
Article

Superior oblique muscle

The superior oblique muscle is one of the six extraocular muscles that control eye movements. It abducts, depresses and internally rotates the eye. Summary innervation: trochlear nerve (CN IV) origin: lesser wing of sphenoid bone adjacent to the annulus of Zinn course: tendon passes through ...
Article

Inferior oblique muscle

The inferior oblique muscle is one of six extraocular muscles that control eye movements. Summary innervation: inferior branch of the oculomotor nerve (CN III) origin: orbital surface of the maxilla insertion: globe (posterior, lateral surface) primary function: one of two ocular external r...
Case

Flexor and extensor insertions at the hand and wrist

  Diagnosis not applicable
Roberto Schubert
Published 24 Aug 2011
38% complete
Diagram
Case

Thigh muscles: cross sectional anatomy

  Diagnosis not applicable
Roberto Schubert
Published 19 Feb 2012
7% complete
Diagram
Article

Biceps brachii muscle

The biceps brachii muscle (also known simply as biceps) is a two-headed muscle in the anterior compartment of the arm that flexes at the elbow and supinates the forearm. Summary origin short head: coracoid process of the scapula long head: supraglenoid tubercle of the scapula insertion: rad...
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

External intercostal muscle

The external (or outermost) intercostal muscles are important muscles of respiration. They number eleven on each side and are located in the intercostal space, expanding the transverse dimension of the thoracic cavity during inspiration. Gross anatomy The external intercostal muscles are the o...
Article

Internal intercostal muscle

The internal intercostal muscles are important muscles of respiration. They number eleven on each side and are located in the intercostal spaces, reducing the transverse dimension of the thoracic cavity during expiration. Gross anatomy The internal intercostal muscles are the middle muscle of ...
Case

Masticatory muscle hypertrophy

  Diagnosis certain
Magdalena Chmiel-Nowak
Published 24 Apr 2020
83% complete
MRI

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