Results 171 to 180 of about 3,802,654 (225)

Double-Bellied Superior Rectus Muscle

Surgical and Radiologic Anatomy, 2019
Congenital variations of extraocular muscles are rare. We report a double-bellied superior rectus muscle, observed in an adult male cadaver aged 70 years. The superior rectus muscle had two equal-sized bellies, which took separate origins from the common tendinous ring and united to form a common belly 1 cm before the insertion. Due to the duplication,
Ashwini Aithal Padur, Satheesha B Nayak, Naveen Kumar   +2 more
exaly   +3 more sources

Ptosis End Underaction of the Superior Rectus Muscle

Ophthalmology, 1984
It is suggested that the association of ptosis and superior rectus muscle underaction is most likely due to the common embryological origins of these two muscles from the same superior mesodermal complex.
exaly   +3 more sources

An Anomalous Muscle Linking Superior and Inferior Rectus Muscles in the Orbit

Anatomical Science International, 2006
Dissections of the bilateral orbits in a 45-year-old female cadaver, who had no ocular movement disorders in her lifetime, revealed anomalous muscles linking the superior and inferior rectus muscles. The muscles, situated between the optic nerve and the lateral rectus muscle, originated from the annulus of Zinn and branched off two heads; one inserted ...
Masahiro Zako, Hirohiko Kakizaki, Masayoshi Iwaki   +2 more
exaly   +3 more sources

Histochemical Analysis of Muscle Fiber Types of Rat Superior Rectus Extraocular Muscle

Acta Histochemica, 2010
Extraocular muscles (EOMs) represent a distinctive class among mammalian skeletal muscles in exhibiting unique anatomical and physiological properties. To gain insight into the basis for the unique structural/functional diversity of EOM fiber types and to explain their high fatigue resistance, rat superior rectus muscle (SRM) was studied using ...
Sherif Helmy El-Alfy, Ihab K. Mohamed
exaly   +3 more sources

Displacement of the Rectus Muscle Pulleys Simulating Superior Oblique Palsy

Japanese Journal of Ophthalmology, 2008
To investigate the structural basis of three cases of apparent superior oblique (SO) palsy caused by extraocular muscle (EOM) pulley heterotopy.Three subjects were diagnosed as having decompensated idiopathic left SO palsy on the basis of misalignment in diagnostic gaze positions, response to the head tilt test, and results of the Hess screen test ...
Joseph L Demer
exaly   +3 more sources

Superior rectus belly transposition in a case of lost medial rectus muscle

Journal of American Association for Pediatric Ophthalmology and Strabismus, 2023
We present a case of exotropia secondary to a lost medial rectus muscle managed using a novel surgical approach, consisting of nasal belly transposition of the superior rectus muscle combined with lateral rectus recession on adjustable sutures. Postoperatively, the patient was orthotropic in primary position and had slight improvement in adduction ...
Alexandros, Damanakis, Persefoni, Kourti
openaire   +2 more sources

Intramuscular Lipoma of Superior Rectus Muscle

Ophthalmic Plastic & Reconstructive Surgery, 2016
The authors describe a case of a 27-year-old man with progressive diplopia and proptosis in whom imaging studies revealed the presence of a mass in the superior rectus muscle. Biopsy showed an infiltrative tumor of mature adipocytes with striated muscle fibres, corresponding to an intramuscular lipoma. Although extraocular muscle lipomas are very rare,
Vanessa, Hristodulopulos, Ramón, Medel
openaire   +2 more sources