Nicotinic receptors are a type of protein found in the nervous system that respond to the neurotransmitter acetylcholine. They play a crucial role in transmitting signals between nerve cells and muscle cells, facilitating communication throughout the body. These receptors are named after nicotine, a compound found in tobacco, which can activate them. These receptors are important for various functions, including muscle contraction and cognitive processes. They are located in both the central nervous system and the peripheral nervous system, influencing activities such as attention, learning, and memory. Dysfunction in nicotinic receptors can be linked to several neurological disorders.