Forgive me if I'm being dense, but that number seems really implausible to me. 172 kCal an hour is (assuming just waking hours consume calories) about 2700 kCal

Forgive me if I'm being dense, but that number seems really implausible to me. 172 kCal an hour is (assuming just waking hours consume calories) about 2700 kCal just from the cortex over the course of a day, which is more than the average Total Daily Energy Expenditure.