9th_Class

Lateralization

Lateralization refers to functional differences between the left and right brain hemispheres in processing information.

Sensation and Perception

• Sensation: Raw data collected by senses, converted to neural energy at receptors.

• Perception: Interpretation of sensory information in the brain. Sensation occurs peripherally while perception is processed centrally.

Auditory System

Processes sound with 10% ipsilateral and 90% contralateral auditory nerve pathways, aiding localization and language perception.

Taste and Smell

• Taste: Involves chemicals on taste buds; aging reduces taste buds.

• Smell: Influences taste and integrates in the orbitofrontal cortex.

Capsaicin and Pain

Capsaicin triggers pain receptors for euphoria; birds lack these receptors. Taste and smell can evoke pain responses.

Sensory Adaptation

Sensory experiences lead to adaptations; tolerance to spicy foods develops over time.

Pain Reflex

The withdrawal reflex involves sensory neurons sending pain signals to the spinal cord and motor neurons for muscle contraction, facilitating quick withdrawal from harmful stimuli.

Inhibition in Behavior

The brain can inhibit reflexes, helping manage pain and guiding decisions.

Pain Sensitivity

Pain tolerance varies by genetics and anticipation influences pain experiences.

Integration of Sensory Systems

Senses have specialized pathways enhancing efficiency, crucial for survival and decision-making based on sensory inputs.