Human scalp and skin cellular membranes and sensory nerve endings

Human scalp and skin cellular membranes and sensory nerve endings represent a complex anatomical and physiological site rather than a single molecular target. These structures contain a variety of specialized receptors and ion channels, such as nociceptors, mechanoreceptors, and thermoreceptors, which are responsible for transducing external stimuli into electrical signals for the central nervous system [1]. In the context of pharmacology, this 'target' is often cited for topical analgesics, anesthetics, and counter-irritants that aim to alleviate pain or itch by modulating the excitability of peripheral nerves [4]. While drugs like lidocaine or menthol are said to act on these endings, their true molecular targets are specific proteins like voltage-gated sodium channels or transient receptor potential (TRP) channels [5]. The scalp specifically involves additional considerations such as hair follicle-associated nerves and unique vascular membranes that influence drug absorption and efficacy [2]. Pathological changes in these membranes or nerve endings are central to conditions like small fiber neuropathy, chronic pruritus, and inflammatory skin diseases [3]. Consequently, this term is considered a descriptive anatomical location for drug action rather than a discrete biochemical entity [6].

Other names

Cutaneous sensory receptorsPeripheral nerve endingsDermal sensory apparatusSkin membranesCutaneous nerve terminals

Drugs interact with this site by modulating the activity of specific ion channels (e.g., voltage-gated sodium channels) or receptors (e.g., TRP channels) located on the membranes of sensory neurons to alter signal transmission and sensory perception [1][4][5].