Neurosurgery is tough, as is the residency to get you there. Every year, there are about 150 spots of residents in neurosurgey, and every one of them works really hard. There's supposed to be a 80hr/week limit for residents, but many work around 120-140hr/week. In a survey of NS residents, 98% slept on average 4 hr per night over the course of the residency.
Check out this answer from an Attending physician on yahoo answers
According to this person, you're probably working around 14hrs on operative days (3 per week), 11 hrs on non-operative days (2 per week), and probably 10-15 hours over the weekend. So that's around 80 hours a week, when not on call.</body></html>