Hippocampal cholinergic system

The hippocampal acetylcholine system is a critical neuromodulatory network that regulates cognitive functions, including memory encoding, attention, and spatial navigation [1.3.1, 1.3.5]. It primarily consists of cholinergic projections from the medial septum and diagonal band of Broca that innervate the hippocampus, releasing acetylcholine to act on a variety of muscarinic (GPCRs) and nicotinic (ionotropic) receptors [1.4.2, 1.4.3]. This system is essential for maintaining hippocampal theta oscillations and facilitating long-term potentiation (LTP), the cellular basis of learning and memory [1.3.2, 1.4.2]. In neurodegenerative conditions such as Alzheimer's disease, the progressive loss of cholinergic neurons and reduced acetylcholine levels are directly linked to cognitive decline [1.3.3, 1.4.4]. Therapeutic strategies often focus on enhancing this system through acetylcholinesterase inhibitors, which increase the availability of acetylcholine in the synaptic cleft to improve symptomatic memory performance [1.3.1, 1.3.4].

Other names

Acetylcholine system in hippocampusSeptohippocampal cholinergic systemCholinergic system of the hippocampus

Acetylcholinesterase inhibition, muscarinic acetylcholine receptor antagonism, and nicotinic acetylcholine receptor agonism