Where does “electroconvulsive” come from?

I need to work through this chain carefully, but I notice there are significant problems with it that make it impossible to write an accurate etymology. The chain provided appears corrupted or incorrectly assembled: - It jumps from "convulsive" to Ancient Greek "ἤλεκτρον" (elektron, amber), which is unrelated - "Latin -ivus" is a suffix, not a source word - The chain lists "Latin con-" twice - It ends with "Latin com" (incomplete) - The chain doesn't actually show how "elektron" (amber/electric) connects to "convulsive" For "electroconvulsive" to be etymologized accurately, I would need: 1. A chain showing "electro-" (from Greek ἤλεκτρον for amber/electricity) 2. A separate chain showing "-convulsive"

electroconvulsive (English): Causing seizures or convulsions by means of...