• orbital
  • The US allows the evaluation of the extrinsic oculomotor muscles, although only little information about the optical nerve at the orbital apex and the degree of proptosis can be obtained. (eurorad.org)
  • Surgical Excision of Orbital Cysticercosis Lodged in Superior Oblique Muscle: Clinical Case Report. (nih.gov)
  • A contrast-enhanced computed tomographic scan of the orbit revealed the presence of a well-defined hypodense cystic lesion within the right superior oblique muscle.The patient was diagnosed with orbital space-occupying mass with acquired Brown syndrome. (nih.gov)
  • The orbit and its contents in 20-22 mm embryos of the North American actinopterygian Amia calva L., with particular reference to the evolutionary significance of an aberrant, nonocular, orbital muscle innervated by the oculomotor nerve and notes on the metameric character of the head in craniates. (wikipedia.org)
  • The last muscle is the inferior oblique, which originates at the lower front of the nasal orbital wall, and passes under the LR to insert on the lateral, posterior part of the globe. (wikipedia.org)
  • optic
  • CT and MR allow for a careful evaluation of the degree of proptosis and the extrinsic muscle thickness, and give information about the indirect signs of a compressive optic neuropathy. (eurorad.org)
  • pathway
  • It should be borne in mind, however, that the branched structure of the oculomotor nerve means that damage sustained at different points along its pathway, or damage caused in different ways (compression versus loss of blood supply, for example), will result in different muscle groups or, indeed, different individual muscles being affected, thus producing different presentation patterns. (wikipedia.org)
  • spasm
  • Drugs such as tropicamide are used in medicine to permit examination of the retina and other deep structures of the eye, and also to reduce painful ciliary muscle spasm (see cycloplegia). (wikipedia.org)
  • Surgical
  • Surgical exploration of the superior oblique muscle was performed, and the cyst was removed from the eye and confirmed by histopathological examination. (nih.gov)
  • After surgery, an ocular motility examination revealed orthotropia in the primary position and downgaze, with mild restriction in levoelevation.Surgical removal could substitute for medical therapy when the cysticercosis is lodged in the superior oblique muscle, although, prior to surgery, important factors, such as patient requirements, surgical skills of the surgeon, and cyst placement, should be considered. (nih.gov)
  • Humans
  • According to these topographic findings, physicians seeking the pathophysiologic characteristics of presbyopia, which occurs in humans and rhesus monkeys on a comparable relative time scale, should redirect their attention toward the ciliary muscle. (uni-regensburg.de)
  • Humans have semicircular canals, neck muscle "stretch" receptors, and the utricle (gravity organ). (wikipedia.org)
  • In humans, the muscle is about 35 mm long. (wikipedia.org)
  • nerve damage
  • Such damage could be a sign or symptom of an underlying disease such as diabetes mellitus, a brain tumor, a pancoast tumor (apex of lung) and diseases which may cause weakness in muscles or nerve damage, such as myasthenia gravis or oculopharyngeal muscular dystrophy. (wikipedia.org)
  • extrinsic
  • The CT scan showed a severe proptosis (distance from the bizigomatic line 29-30 mm, Fig. 1a), an increased thickness of all extrinsic oculomotor muscles, especially the medial straight muscle (12 mm on the right side and 11 mm on the left side Fig. 1b) and the superior straight muscle (8 mm on the right side and 10 mm on the left side, Fig. 1c). (eurorad.org)
  • In particular, an MRI offers more possibilities for the tissue typing because it shows early degenerative phenomena of the extrinsic muscles and structural variations of the postorbital cellular flail tissue. (eurorad.org)
  • Inferior oblique muscle Extrinsic eye muscle. (wikipedia.org)
  • innervation
  • Thus, when presented with a threatening stimuli that activates the fight-or-flight response, this innervation contracts the muscle and dilates the iris, thus temporarily letting more light reach the retina. (wikipedia.org)
  • Yet another interpretation of the coelacanthiform basicranial muscle and its innervation. (wikipedia.org)
  • Below is a table of each of the extraocular muscles and their innervation, origins and insertions, and actions. (wikipedia.org)
  • ciliary muscle
  • Ciliary muscle topography and connective tissue distribution were studied by light microscopy in atropinized, pilocarpinized, or untreated eyes from rhesus monkeys of various ages. (uni-regensburg.de)
  • With age, the connective tissue ground plate between ciliary muscle and ciliary processes thickens, while there is very little increase in connective tissue within the ciliary muscle. (uni-regensburg.de)
  • In pilocarpinized eyes, the ciliary muscle is shorter, narrower, smaller in longitudinal and total area (ie, more circular and compact), and positioned more anteriorly than in contralateral atropinized eyes. (uni-regensburg.de)
  • Ciliary muscle (photosensitive) forms the pupil himself, regulates only the amount of light, shrinking and expanding, and the main function of good vision lies on oculomotor muscles. (eyesvisions.com)
  • Esotropia
  • CONCLUSIONS: Topical anesthesia requires a smaller amount of surgery and number of operated muscles to correct esotropia compared with classic surgery guidelines adapted to the surgeon's personal technique. (biomedsearch.com)
  • arise
  • Oculomotor palsy can arise as a result of a number of different conditions. (wikipedia.org)
  • David A. Robinson discovered that the eye muscles require this dual velocity-position drive, and also proposed that it must arise in the brain by mathematically integrating the velocity signal and then sending the resulting position signal to the motoneurons. (wikipedia.org)
  • control
  • strəbĭz`məs) , inability of the eyes to focus together because of an imbalance in the muscles that control eye eye, organ of vision and light perception. (thefreedictionary.com)
  • There are more α-MNs in the spinal cord than in the brainstem, as the number of α-MNs is directly proportional to the amount of fine motor control in that muscle. (wikipedia.org)
  • For example, the muscles of a single finger have more α-MNs per fiber, and more α-MNs in total, than the muscles of the quadriceps, which allows for finer control of the force a finger applies. (wikipedia.org)