The minute you walk into your garage after taking a short break, you are struck by the strong smell of spray paint. After about 10 minutes of painting, however, you no longer notice it. This is probably the result of .

Olfactory fatigue, or nose blindness.

Explanation:

This is  inability of an individual to perceive a particular  smell  after prolong exposure  to  the molecules of the odours  substance.It  due to gradual loss of sensitivity  of the olfactory receptor cells  after long exposure.

Olfactory fatigue is an  adaptive process of the brain to prevent overloading of two many sensory inputs in the olfactory memory.

Therefore  it blocks   sensitivity of the olfactory receptors in the nasal membrane to the molecules of the  usually exposed odours substances,so that  new neural    pathways for  the newly acquired stimuli exposed to,  will be created-(this is refers to as changed of neuron)

Thus it is the blockage of   sensitivity of the olfactory receptors  by the brain that explains  reasons for lack of perception after prolong exposure.

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