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PHYSCI CM223 · Lec 1

Neurobiology of Sleep

Fall 2026Colwell, C.S. and Nwaobi-Petersen, S4 units

Also listed as NEURO CM223 (closed by the department, needs consent): the same class, and each department holds its own seats and its own grade history.

dibs reads this section's seats hourly, like everything else, but it does not send alerts for graduate courses yet.

Seats, time, final and grades

Seats

Closed by the department.

3 enrolled enrolled. The department published this count and no capacity, so there is no share to fill.

Read 5 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Meets

MW 4:00pm-5:50pm

Lecture only. You also attend a discussion, listed below.

Final

Thu 10 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 4 days ago.

Grades

no grade history

Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

Restrictions checked 4 days ago and may be outdated. Seat alerts are unavailable for this course. Check the registrar.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

3 discussions, none open. No waitlist listed.

No discussion is open. Whatever the lecture reads, there is currently nothing here to enroll in.

When it meets

Discussion alternatives are shown with the lecture; choose one linked discussion.

Mon
Tue
Wed
Thu
Fri
4pm
5pm
6pm

Lec 1

4pm-5:50pm

Lec 1

4pm-5:50pm

Dis 1A

4pm-4:50pm

Dis 1B

5pm-5:50pm

Dis 1C

6pm-6:50pm

Scroll sideways for the whole week. All meeting times are listed below.

  • Lec 1

    MW 4:00pm-5:50pm

  • Dis 1A (alternative; recorded closed by department)

    R 4:00pm-4:50pm

  • Dis 1B (alternative; recorded closed by department)

    R 5:00pm-5:50pm

  • Dis 1C (alternative; recorded closed by department)

    R 6:00pm-6:50pm

Mathematical Sciences 5200

Grades

no grade history

More about PHYSCI CM223, though its grade history is empty too.

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

Workload, very light. 5.0 of 5 for Christopher Colwell, where 5 is lightest. Read 15 days ago.

What the work looks like

  • Papers mentioned, no number given, 1 mention in past reviews
  • Presentations mentioned, no number given, 1 mention in past reviews

Based on 2 reviews; source checked 7 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Will it still be here

Not a question any more: see the notice at the top of this page.

Seats over time

Nothing read since 16 Oct, 5 hours ago. Over about 2 months before that, filled by 1.

2 to 3 enrolled across 3 readings, +1.

18 Aug 22:4017 Sep 08:1616 Oct 17:53 · 5 hours ago
Checked 168 of the 592 hours with hourly history, 28%. No reading was recorded in 424 hours. dibs had no hourly record before 22 Sep, which is the other 820 of 1412 plotted.Seats from 18 Aug 22:40 to 16 Oct 17:53, 2 to 3. Too few observations to establish a trend. Checks are not continuous monitoring. Changes between checks may be missed.

A dot is a reading, and there are only two or three of them here. The line joins the measurements; two or three readings are too few to read a trend from. The last dot is the last time dibs read this section, moved or not, and that was 5 hours ago. It is the last thing dibs saw, not where the count is now.

Show the readings (3)
Recorded Enrolled Capacity Status Waitlist Hours read
16 Oct 17:53 3 0 closed by the department - 122 of 432
28 Sep 18:52 3 0 closed by the department - 47 of 981, 820 no hourly record
18 Aug 22:40 2 0 closed by the department - -
How readings and alerts work

Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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