Smell

Smelling process

The receptor cells send messages to the brain’s olfactory bulb, and then to the temporal lobe’s primary smell cortex and to the parts of the limbic system involved in memory and emotion

odor molecules

has unique shape and size

• triggers various smell receptors instead of any specific ones

Smell properties

• Smell peaks in adulthood then declines

• An odor’s attractiveness is learned. 

• There is a hotline that runs between the brain area that get information from the nose and the brain’s ancient limbic center associated with memory and emotion

The 6th sense

• our 6th sense is our awareness of our body position and movement

• Kinesthesis - the sense of our body’s position and movement (of individual body parts)

• Vestibular sense - our sense of the head position and movement

How does Vestibular Sense work

our ear’s semicircular canales and vestibular sacs contain fluid that move when our head rotates or tilt. This stimulates the hair-like receptor to send signals to neurons, and we sense our body position and maintain our balance