What’s on the Sleep poster
A 4-row table: Stage · Share · Associated with.
One cycle is roughly 90 minutes, repeating four to six times.
- N1 — ~5% — Transition, hypnic jerks
- N2 — ~45% — Sleep spindles, K-complexes
- N3 deep — ~25% — Growth hormone, immune function, declarative consolidation
- REM — ~25% — Dreaming, procedural and emotional consolidation
REM atonia paralyses the body during dreaming. Sleep paralysis is that atonia persisting into waking.
Questions about the Sleep poster
- What’s on the Sleep poster?
- A 4-row table: Stage · Share · Associated with. One cycle is roughly 90 minutes, repeating four to six times. N1 — ~5% — Transition, hypnic jerks; N2 — ~45% — Sleep spindles, K-complexes; N3 deep — ~25% — Growth hormone, immune function, declarative consolidation; REM — ~25% — Dreaming, procedural and emotional consolidation. REM atonia paralyses the body during dreaming. Sleep paralysis is that atonia persisting into waking.
- Who is the Sleep poster for?
- Sleep belongs to the Psychology section rather than to a school year, because life science is not something one grade owns. Anyone learning biological can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Sleep poster?
- Deep sleep front-loads the night; REM back-loads it. Cutting sleep short costs mostly REM. A wall chart earns its place by being glanceable from where the work is happening, so Sleep belongs on the wall where that life science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Sleep?
- Biological Rhythms, Brain Imaging and Brain Structures sit alongside Sleep in the Psychology section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Biological RhythmsBrain ImagingBrain Structures
- Is the Sleep poster free to download and print?
- Yes. Sleep downloads as a free PDF with no account, no email and no watermark, like everything else in the Psychology section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Sleep poster print at?
- Sleep is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Sleep loses nothing.Printing guide
Related posters
Charts that sit alongside Sleep on the same wall.
Browse every Psychology poster, or start from the full catalogue.