CACNA1H and neuropathic pain: Particularly, the T-type calcium channels are divided into three isoforms, Cav3.1, Cav3.2, and Cav3.3 channels, and from these, it is the Cav3.2 channel that regulates the neural excitability in primary afferent pain fibers in the presence of nociceptive and neuropathic pain.