2007 Sensory Physiology

Stimulus Location

Acuity: the ability to precisely localize a stimulus

1. RECEPTIVE FIELD SIZE:

  • the smaller the receptive field, the better the acuity

S&G Figure 10.11

(see also the discussion of 2 point discrimination)

Receptive field size

2. RECEPTOR DENSITY:

  • the more receptors per receptive field, the better the acuity
  • generally, receptors are concentrated in the centre of the receptive field
Receptor density
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