Central appetite regulatory network

The central appetite regulatory network is a complex, multi-regional anatomical system primarily centered in the hypothalamus and the hindbrain that integrates peripheral and central signals to maintain energy homeostasis. Within the hypothalamus, the arcuate nucleus (ARC) serves as a primary hub, containing pro-opiomelanocortin (POMC) neurons that signal satiety and Agouti-related peptide (AgRP)/Neuropeptide Y (NPY) neurons that stimulate hunger [1][2]. The hindbrain, specifically the nucleus tractus solitarius (NTS), receives vagal afferent signals regarding gastric distension and gut peptide release (e.g., CCK, GLP-1) to coordinate short-term meal termination [3]. Additionally, the mesolimbic reward system, including the ventral tegmental area (VTA) and nucleus accumbens, modulates hedonic feeding by processing the palatability and incentive value of food [4]. Dysregulation of these circuits—often through leptin resistance or altered sensitivity to satiety hormones—is a fundamental driver of obesity and various eating disorders [5]. Modern pharmacological interventions, such as GLP-1 receptor agonists and MC4 receptor agonists, specifically target these regions to suppress appetite and promote weight loss [6].

Other names

Brain regions involved in appetite controlHypothalamic-hindbrain appetite axisAppetite regulatory circuitFeeding centers

Modulation of hunger and satiety signaling through G protein-coupled receptor agonism (GLP-1R, MC4R), sympathomimetic amine release, and opioid receptor antagonism within hypothalamic and reward-based neurocircuits.