Caption: Signal summation, animation. Every nerve cell, or neuron, connects with thousands of other neurons, often receiving multiple impulses from them. Sometimes, a single impulse from one neuron is enough to induce an impulse in the other. However, it is often the case that one neuron will need to receive several impulses from other neurons before it is sufficiently stimulated to fire off its own impulse. Summation, either spatial or temporal, is the addition of these impulses in a neuron. Spatial summation occurs when simultaneous impulses received at different places on a neuron add up to make it fire. Temporal summation occurs when impulses received at the same place on a neuron add up over time. For a labelled version of this animation, see K004/2028.

Release details: Model release not required. Property release not required.

Keywords: action potential, animated, animation, axon, axon terminal, biological, biology, cell biology, depolarisation, depolarised, depolarising, depolarization, depolarized, depolarizing, excitatory, frequency summation, impulse, inhibitory, nerve cells, neurones, neurons, neurophysiology, neurotransmitter, postsynaptic, presynaptic, spatial summation, summation, synapse, synaptic, synaptic terminal, temporal summation

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Signal summation, animation

K004/2027 Rights Managed

Downloadable master

Duration: 00:00:29.05

Frame size: 1440x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 1.4G


Capture format: QuickTime Animation

Frame size: 1920x1080

Codec: H.264

Please contact Science Photo Library if you require the original, or other formats.


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