Nanatomy of extraocular muscles pdf

Anatomy and physiology of extraocular muscles and applied. This tutorial covers the anatomy, actions and innervation of the extraoccular eye muscles. Note that the rectus muscles pull the eye posteriorly while the oblique muscles pull the eye anteriorly. The inferior rectus muscle of rat, one of the extraocular muscles, contains two populations of multiply innervated fibers mifs. Embryology of the extraocular muscles and their innervation published on by oxford university press. The extraocular muscles eoms bring about eye movement and studies exist which measure eom length, crosssectional diameter and volume. Extraocular muscles cranial nerve innervation lr6so4 rest 3. Anatomy of the orbit and extraocular muscles flashcards. The extraocular muscle pulley system is fundamental to the movement of the eye muscles, in particular also to ensure conformity to listings law. Extraocular muscles eye this video was made in collaboration with, check out the related article to consolidation your learning on this topic.

The extraocular muscles are innervated by three cranial nerves. Normal anatomy and anomalies of the rectus extraocular muscles in human. The veins from the extraocular muscles correspond to the ar teries and empty into the superior and inferior orbital veins, respectively. Determine the spatial relationship between the two eyes. Extraocular muscles differ histologically from most other skeletal muscles in that they are made up of 2 different types of muscle cells. The lateral rectus is innervated by the abducens nerve cn vi. Anatomy, head and neck, eye extraocular muscles statpearls. Lateral rectus is 6th superior oblique is 4th rest are all 3rd cranial nerve. Assessment of extraocular muscles position and anatomy by 3dimensional ultrasonography. These include four rectus muscles, two oblique muscles, and the levator. Pdf assessment of extraocular muscles position and. Extraocular muscles basic and clinical anatomy lecturio. The detailed embryologic and histologic features of extraocular muscle tendons from early. The superior oblique muscle is innervated by the trochlear nerve cn iv.

Accident risk of severing of vortex veins during ir and sr rece ssion or resection, io muscle weakening and so muscle tendo n. The anatomy of the extraocular muscles was studied in 10 adult opossums didelphis albiventris of both sexes. There are a total of four rectus muscles, two oblique muscles, and the standalone levator palpebrae. Extraocular muscles cranial nerve innervation medical. View anatomy physiology extraocular muscle ppts online, safely and virusfree. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Eye movements are the result of the action of the extraocular muscles eoms. Pdf normal anatomy and anomalies of the rectus extraocular. This video demonstrates the structure and function of the extraocular muscles. Comparative anatomy of the extraocular muscles in four. There is the seventh extraocular muscle that provides the elevation of the upper eyelid, and that is the levator palpebrae superioris. This will alter the resting gaze of the affected eye.

The extraocular eye muscles are innervated by three cranial nerves. Pdf the medial rectus is one of seven extraocular muscles. Abstract extraocular muscles are classically grouped as four rectus and two. Of all of the extraocular muscles, the supe rior oblique has the shortest muscle length 32 mm and the longest tendon length 26 mm, whereas the inferior. Anatomical study of the opossum didelphis albiventris. The third cranial nerve, the oculomotor nerve, innervates all the extraocular muscles except the lateral rectus and the superior oblique muscles. Start studying anatomy of the orbit and extraocular muscles. The rectus muscles originate very close one to another between the orbital surfaces. The motor innervation of the extraocular muscles is provided by three cranial nerves. The movements of the extraocular muscl es take place under the influence of a sys tem of extraocular mu scle pulleys, soft tissue pulleys in the orb it. Media in category extraocular muscles the following 38 files are in this category, out of 38 total.