Skill · Shadow Hand
Close fist
The Shadow Hand closes into a fist only while the “fist” pathway is ON.
Runs on the Shadow Hand · Dexterous hand
01 Pathway
How the neurons drive it.
A pathway is one cue: the electrode we pulse, the electrodes we read, and the rule that decides when it is ON. This skill has one.
“fist”
- Pulse electrode
- 49at 10 Hz
- Read electrodes
- 40 41 42 48 50 57 58
- ON at
- 0.6spikes per electrode per 100 ms
We pulse electrode 49 at 10 Hz. When electrodes 40, 41, 42, 48, 50, 57 and 58 average at least 0.6 spikes per 100 ms, and twice the rate of the rest of the array, “fist” is ON.
These are the skill file’s starting electrodes, numbered column by column across the 8 × 8 array. Calibration moves each pathway onto electrodes your culture actually answers on and raises its ON threshold above resting noise.
02 Movement
What the Shadow Hand does.
“curl” drives a finger’s two outer joints together (0 = straight, 3.14 = fully curled).
Target pose “fist”
- index flex
- 1.48 rad
- index curl
- 2.9 rad
- middle flex
- 1.48 rad
- middle curl
- 2.9 rad
- ring flex
- 1.48 rad
- ring curl
- 2.9 rad
- little flex
- 1.48 rad
- little curl
- 2.9 rad
- thumb flex
- 1.24 rad
- thumb bend
- 0.7 rad
- thumb tip
- 0.7 rad
03 The test
Moves only while cued.
Pulse ‘fist’ from 1 s to 4 s: the hand should close only while pulsed.
It passes when
- 01Closes while pulsed
- 02Open before pulses
- 03Opens after pulses
04 Proof
Proof it is the neurons.
Validation replays this test three times on the same spontaneous activity. The skill counts only if it passes with stimulation and fails under both controls; if it also passes without the neurons, it is marked invalid.
05 More skills
Shadow Hand
Train “Close fist” on the Shadow Hand.
Choose a biocomputer, launch, and watch it calibrate, train and validate.