The pupil is significantly involved in the visual process. It regulates the incidence of light on the retina and is thus involved in the formation of the visual impression. Through the process of stimulus processing, it adapts to the prevailing light conditions. What is the pupil? In the eye, the pupil is visible as a … Pupil: Structure, Function & Diseases
Nerve tracts from the head and neck converge in the superior cervical ganglion or superior cervical ganglion. Anatomically, four broad areas can be distinguished, each comprising several branches; these rami belong to different nerve tracts and form part of the sympathetic nervous system. Damage to the cervical supercervical ganglion can result in loss of body … Superior Cervical Ganglion: Structure, Function & Diseases
Location The Stellate ganglion is formed by the fusion of the cervical ganglion, which is the lowest ganglion of our neck, with the first ganglion of our chest. The resulting name is Ganglion cervicothoracicum. So it represents a large nerve plexus. It can be found on the back end of the uppermost rib and behind … Stellate ganglion
Horner syndrome The term Horner syndrome describes the failure of the ganglion already discussed and the associated failure symptoms. Possible causes are a failure of the sympathetic nervous system (spinal cord segments in the chest and neck area), direct damage to the ganglion or its leading nerves. Three characteristic signs are always present under the … Horner syndrome | Stellate ganglion
Anatomy A ganglion of the nervous system is an accumulation of many nerve cell bodies at specific locations in the body. The ganglion takes the form of a thickening of the nerve cord. Depending on the location of the ganglion, it can be divided into different forms. If they are categorized according to body regions, … Ganglion of the nervous system
Stellate ganglion The ganglion stellatum also belongs to the autonomous nerve cell aggregations. In contrast to the ganglion oticum, however, it contains only sympathetic nerve fibers. The Stellate ganglion is located at the level of the lower cervical spine at the transition to the thoracic spine. The stellate ganglion is the result of the fusion … Stellate ganglion | Ganglion of the nervous system
The sphincter pupillae muscle is one of the internal eye muscles and is responsible for constricting the pupil. This so-called miosis takes place reflexively when light enters the eye and is also part of the near vision tria. The sphincter pupillae muscle can be artificially stimulated to contract using substances such as miotics. What is … Musculus Sphincter Pupillae: Structure, Function & Diseases
Symptom complex Horner’s syndrome manifests itself through three defined signs of disease (symptom triad). These signs of the disease are: This eye symptomatology is accompanied by a disturbed sweating of the upper halves of the body. Horner’s syndrome is not an independent disease, but only a symptom (sign) of a disease. However, certain nerves show … Horner syndrome
