Central nervous system neural circuit

Central nervous system neural circuits refer to functionally and anatomically defined assemblies of neurons interconnected by synapses that are responsible for processing sensory input, generating motor output, regulating behavior, and higher-order functions such as cognition and emotion[1][2][5]. These circuits are composed of chemically and electrically diverse excitatory and inhibitory neuron types (e.g., glutamatergic, GABAergic), each with distinct molecular phenotypes and synaptic connection patterns[1][2][4]. Advances in transcriptomics and imaging have revealed complex organizational features, with region-specific circuit motifs in structures including the cortex, hippocampus, and hypothalamus[1][2]. Aberrant function or connectivity within neural circuits contributes to neurological and psychiatric diseases, but the circuits themselves are not molecular entities and are not directly targeted by drugs; instead, drugs act on circuit components such as receptors, ion channels, and neurotransmitter transporters[1][2][5]. This entry describes a functional/anatomical unit, not a molecular target, so most structure-based drug target or biomarker attributes are not applicable.

Other names

CNS neural circuitneural circuitbrain circuit