The external capsule is a route for cholinergic fibers from the basal forebrain to the cerebral cortex.

Vulpian-Heidenhain-Sherrington phenomenon is a term given for slow contraction of denervated skeletal muscle by stimulating the autonomic cholinergic fibers innervating its blood vessels.

The other postganglionic fibers of the peripheral autonomic system belong to the parasympathetic division; all are cholinergic fibers, and use acetylcholine (ACh) as their neurotransmitter.

Peripheral autonomic fibers (sympathetic and parasympathetic fibers) are categorized anatomically as either preganglionic or postganglionic fibers, then further generalized as either adrenergic fibers with their corresponding adrenergic receptors, or cholinergic fibers with their cholinergic receptors.