See It · Anatomy of the Nervous System

Nervous System Anatomy Lab

Map the brain, follow the CSF, send signals through the cord, and master the 12 cranial nerves. Nothing here is graded.

Part 1 · Brain Region Mapper

View

Mode

Show all labels

Part 2 · CSF Flow

Activity

Pressure in lateral and third ventricles Pressure in fourth ventricle Pressure in subarachnoid space

Presets

Controls

CSF production (choroid plexus) Reabsorption (arachnoid granulations) Block the cerebral aqueduct Block the fourth ventricle's apertures

Pressures are in relative units, not mmHg. Time is sped up a lot: one second here stands for many minutes.

Put the steps of CSF flow in order, from where it is made to where it returns to the blood. Drag a card, or use its arrow buttons.

Relaxed mode (no timer) 0:00

Your path on the brain

Numbers show where each of your cards sits. A correct path flows smoothly; a wrong one jumps around.

Wrong answers are fine here. Read why, then try again.

Part 3 · Spinal Cord Lab

Activity

Label the cross-section

1. Pick a label. 2. Click its spot on the picture (or its pin button).

Relaxed mode (no timer)0:00

Signal in the dorsal root Felt by the brain Muscle contraction

Stimulus

Damage (try one at a time)

Press Touch the skin to send a signal.

The reflex loop is simplified to one interneuron. Speeds are slowed way down so you can watch.

Which structure is damaged?

Wrong answers are fine here. Read why, then try again.

Part 4 · Cranial Nerve Challenge

Round Relaxed mode (no timer)0:00

Order and name

Put the 12 nerves in order, I (front) to XII (back). Drag, or use the arrows.

Click the nerve on the picture, or pick its number:

Dr. Akash Garg · See It: Anatomy & Physiology · Chapter 13, Anatomy of the Nervous System (OpenStax A&P 2e) · Pair with the Nervous System Anatomy Walkthrough.
Diagrams are simplified and not to scale. The CSF simulator uses relative units and sped-up time to show cause and effect, not real clinical values.