Nicotinic acetylcholine receptors/nAChRs are involved in cognitive processes in the brain and in controlling muscle movement. nAChRs are not classic Cannabinoid receptors but their activity is modulated by cannabinoids. Since cannabinoids have a physiological effect on nAChRs they are effectively Cannabinoid receptors.
Pertwee, R.G., Howlett, A.C., Abood, M.E., Alexander, S.P.H., Di Marzo, V., Elphick, M.R., Greasley, P.J., Hansen, H.S., Kunos, G., Mackie, K., et al. (2010). International Union of Basic and Clinical Pharmacology. LXXIX. Cannabinoid receptors and their ligands: beyond CB₁ and CB₂. Pharmacol. Rev. 62, 588–631.
nAChRs are expressed in brain and in muscle.