The lacrimal nerve represents a branch of the ophthalmic nerve and sensitively innervates the conjunctiva (tunica conjunctiva) and parts of the eyelid. It is connected to the facial nerve and the zygomatic nerve. The latter gives fibers to the lacrimal nerve via a communication branch, which influence the lacrimal gland. What is the lacrimal nerve? … Lacrimal Nerve: Structure, Function & Diseases
The medulla oblongata is the most caudally located part of the brain and is also known as the medulla. This brain region is best known as the center of respiration, reflexes, and blood circulation. Failures of the medulla oblongata are associated with brain death and can cause bulbar brain syndrome, midbrain syndrome, or apallic syndrome. … Medulla Oblongata: Structure, Function & Diseases
The tympanic nerve is a part of the IX cranial nerve. It is located in the middle ear. There, it innervates the eustachian tube. What is the tympanic nerve? The tympanic nerve is a branch of the glossopharyngeal nerve. This is the IXth cranial nerve. Its main function is to regulate the muscles of the … Tympanic Nerve: Structure, Function & Diseases
The vestibulocochlear nerve is a sensory nerve cord composed of the cochlear nerve, the auditory nerve, and the vestibular nerve, the vestibular nerve. The nerve cord is also referred to as the 8th cranial nerve. The afferent sensory nerves transmit auditory and vestibular messages to the corresponding brain nuclei. The auditory nerve in particular also … Vestibulocochlear Nerve: Structure, Function & Diseases
The masseter reflex is an intrinsic reflex of the masticatory muscles that is triggered by a blow to the lower jaw and closes the jaw. The reflex is one of the muscle stretch reflexes and corresponds to an innate reflex movement of the masseter muscle. The masseter reflex may be absent in peripheral and central … Masseter Reflex: Function, Tasks, Role & Diseases
The tractus solitarius is a central nerve guidance pathway with a surrounded nucleus tractus solitarii. The conduction pathway plays a role primarily in the senses of taste and smell, whose sensory cells transmit signals to the central nervous system via the tractus solitarius. Reflexes such as the gag reflex fail in lesions of the conduction … Tractus Solitarius: Structure, Function & Diseases
The parasympathetic nervous system is the part of the autonomic nervous system that provides rest and relaxation in the body. It influences a variety of internal organs. The parasympathetic nervous system coordinates the functions of the organs so that the entire body can slide into a state of rest. What is the parasympathetic nervous system? … Parasympathetic Nervous System: Structure, Function & Diseases
Eye movement serves all aspects of vision and is also partially controlled by reflexes triggered by self-motion, such as detecting and tracking an object. In this process, the image is placed and held in the center of the yellow spot, which is the fovea. As soon as an object moves, subsequent movements of the eye … Eye Follow Movement: Function, Task & Diseases
Elegance and beauty of the body are shown in fluid and harmonious movements. A ballet dancer, for example, controls her body perfectly. She knows how to control her muscles so that each part of the body is brought into a structured image for the viewer. The entire body is directed to convey a statement, an … Body Tension: Function, Tasks, Role & Diseases
The pupillary reflex describes the involuntary adaptation of the eye to changing light conditions. The width of the pupil changes reflectively with incident light. This reflex is controlled by the parasympathetic nervous system and plays an important role in visual acuity and in the protection of the retina. If the environment is very bright, the … The pupil reflex
How can the pupillary reflex be tested? The examination of the pupillary reflex is one of the standard examinations in neurology. The pupillary reflex can be tested by means of a flashlight examination. This involves illuminating one eye and examining the reaction of both eyes. If deviations occur, this is called anisocoria. Normally, the doctor … How can the pupillary reflex be tested? | The pupil reflex
What is the convergence reaction? The term convergence reaction describes the reflex process of the eye when the focus changes from a distant object to a near object. On the one hand, this results in a convergence movement of the eyes. This means that the pupils of both eyes are directed towards the center line … What is the convergence reaction? | The pupil reflex