The amount of light entering the eye is controlled by a reflex action. The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris.

and involuntary twitching of the eye muscles. Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system (CNS). The CNS includes the brain, spinal cord, and optic nerves.

Researchers have conducted one of the largest eye studies ever, revealing that retinal thickness could play a key role in ...

You look straight ahead and cover one eye, the physician then waves a finger from the side of your head to the middle. The autonomic nervous system controls your body's vital functions ...

The questions in this quiz are suitable for GCSE biology students studying homeostasis, the nervous system, the reflex arc, the brain and the eye. If you struggled with the quiz, don't panic - we ...

The oculomotor system consists of interconnected regions throughout the central nervous system that interact to control various eye movements. It includes different brainstem nuclei, the superior ...

Based on the examination, the problem can be traced to, for example, a specific area of the brain, the peripheral nervous system or part of the spine. Any necessary further investigations are then ...

The nervous system consists of the central nervous system (brain and spinal cord) and the peripheral nervous system (motor nerves, sensory nerves, cranial and spinal nerves, autonomic ganglia ...