CACNA1H and epilepsy: T‐type calcium channels (Cav3.1, 3.2, 3.3) are low‐threshold voltage‐gated channels with fast inactivation and slow deactivation rates.[30] All three subtypes are widely expressed in the nervous, neuroendocrine, and cardiovascular systems, and play important roles in sleep homeostasis, the response to pain, and the development of epilepsy.[31, 32, 33] Among them, Cav3.2 is widely expressed in the central nervous system, where it controls neuronal excitability and is involved in pain sensation.