Neuronal membrane phospholipid bilayer

The neuronal membrane phospholipid bilayer is a complex, fluid matrix composed of phospholipids, cholesterol, and glycolipids that serves as the fundamental structural boundary of neurons. It plays a critical role in maintaining the electrochemical gradients required for neuronal excitability and the propagation of action potentials (Sampaio et al., 2011). Beyond its role as a barrier, the bilayer organizes specialized microdomains known as lipid rafts, which facilitate the clustering and efficient signaling of receptors and ion channels (Farooqui et al., 2000). In neurodegenerative diseases like Alzheimer's and Parkinson's, the membrane is often compromised by lipid peroxidation and changes in lipid composition, which contribute to synaptic failure and neuronal death (Butterfield et al., 2001). Pharmacologically, the bilayer is the site of action for general anesthetics, which are hypothesized to act by perturbing the lateral pressure and fluidity of the lipid matrix (Heimburg & Jackson, 2005). Furthermore, the emerging field of membrane lipid therapy (melitherapy) utilizes specific lipids to restore membrane integrity and regulate the function of membrane-bound proteins in various neurological disorders (Escribá et al., 2008).

Other names

Neuronal plasma membraneNerve cell membraneNeuronal lipid bilayerSynaptic membrane

Modulation of membrane physical properties, including fluidity, thickness, and lateral pressure, which regulates the conformational states and activity of membrane-embedded proteins such as ion channels and G protein-coupled receptors (Escribá et al., 2008; Heimburg & Jackson, 2005).