Neurons

Input Neurons
Input neurons are used by the creature to sense its environment. These neurons provide the creature with its senses such as seeing, hearing or touching. Input neurons can not receive signals from other neurons but can send signals to other middle neurons and output neurons. The different input neurons are:
 * Antenna
 * Blink Sensor
 * Cell Antenna
 * DNA Sensor
 * Energy Sensor
 * Eye
 * Feed Sensor
 * Food Sensor
 * Movement Sensor
 * Direction Sensor
 * Pain Sensor
 * Pheromone Sensor
 * Random Input
 * Smell Sensor
 * Sonar
 * Sound Sensor
 * Ticker

Middle Neurons
Middle neurons form a connection between other neurons. They receive their input from other neurons and can send signal to other neurons. The different middle neurons are:
 * Activator
 * Cell Poker
 * Counter
 * External Sender
 * External Receiver
 * Nerf End
 * Neuron
 * Nerf
 * Random Neuron
 * Randomizer
 * Target Neuron
 * Threshold Changer

Output Neurons
Output neurons can receive signals from neurons and can also send signals to other neurons. Output neurons also perform a special task when they are triggered which allows the creature to interact with the world. The different output neurons are:
 * Blinker
 * Creature Connector
 * Disconnector
 * DNA Copier
 * Feeder
 * Fin
 * Grabber
 * Jet
 * Lamp
 * Lock
 * Membrane Maker
 * Mouth
 * Muscle
 * Other Turner
 * Paddle
 * Pheromone Emitter
 * Piston
 * Poison Emitter
 * Remote DNA Builder
 * Smell Changer
 * Skin Changer
 * Speaker
 * Stinger
 * Turner
 * Energy-Sharer
 * Elastic
 * DNA Cloner

Other Neurons
These neurons do not send or receive signals, but take up space in a creature's neural network. They are used for various other things:
 * DNA Builder
 * Muscle End
 * Anti Poison
 * Armor
 * Elastic End
 * Energy-Sharer-End
 * Photosynthesis
 * DNA

Unused

 * Vein
 * Vein Releaser