The startle response is a sudden, reflex-like response to an unexpected stimulus, such as a loud noise or bright light. It is an unlearned and largely unconscious defense mechanism shared by animals ...

Overactive reflexes might point to neuron disorders or anxiety. The Babinski reflex in adults may signal brain or spinal cord issues. Hoffman's reflex could indicate a spinal cord problem. A reflex is ...

What is the acoustic reflex? When a loud sound stimulus is presented to the ear, there is a reflexive contraction of the minute muscles that are connected to the ossicles in the Middle Ear. When these ...