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Nervous System, The

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Encyclopedia of Animal Cognition and Behavior

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Brain; Central nervous system; Peripheral nervous system

Introduction

Living organisms sense the changes in the external environment and respond accordingly to maintain homeostasis. The survival of organisms depends on how they sense and respond to their surroundings. The quicker the responses, the better the chances of survival. Early in evolution, animals acquired a system which helped them to integrate multiple sensory inputs and produce directed responses at a speed of hundreds of kilometers per hour. This system is referred to as the nervous system (NS) – an organized network of cells having processes extended throughout the body, which can sense external cues and direct responses from simple voluntary or involuntary movements of the body to managing emotions or solving complex survival problems. Even simple NS of primitive animals have staggering complexity in the way they process information, store it, and decode it based on the stimulus. Humans have a marvelously...

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Correspondence to Vijaykumar Yogesh Muley .

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Muley, V.Y., Larriva-Sánchez, F. (2022). Nervous System, The. In: Vonk, J., Shackelford, T.K. (eds) Encyclopedia of Animal Cognition and Behavior. Springer, Cham. https://doi.org/10.1007/978-3-319-55065-7_589

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