a test for cranial nerve vi would be asymmetry.
a test for cranial nerve vi would be asymmetry.
a test for cranial nerve vi would be?
asymmetry
a cranial nerve exam begins with observation of the patient because some cranial nerve lesions may affect the symmetry of the eyes or face. the visual fields are tested for nerve lesions or nystagmus via an analysis of specific eye movements. the sensation of the face is tested, and patients are asked to perform different facial movements, such as puffing out of the cheeks. hearing is checked by voice and tuning forks. the position of the patient's uvula is examined because asymmetry in the position could indicate a lesion of the glossopharyngeal nerve. after the ability of the patient to use their shoulder to assess the accessory nerve (xi), and the patient's tongue function is assessed by observing various tongue movements.
cranial nerves
nonselective horizontal gaze palsies are caused by lesions in the abducens nucleus. this is where the cranial nerve vi leaves on its way to the lateral rectus muscle, which controls eye movement horizontally away from the midline of the body. the cranial nerve vi also has interneurons connecting to the medial rectus, which controls horizontal eye movement towards from the midline of the body. since the lateral rectus controls movement away from the center of the body, a lesion in the abducens nucleus disrupts the pathways controlling outward movements, not allowing the right eye to move right and the left eye to move left. nerve vi has the longest subarachnoid distance to its target tissue, making it susceptible to lesions. lesions anywhere in the abducens nucleus, cranial nerve vi neurons, or interneurons can affect eye movement towards the side of the lesion. lesions on both sides of the abducens nucleus can cause a total loss of horizontal eye movement.
conjugate gaze palsy