PSY2061 Lecture Notes - Lecture 5: Outer Plexiform Layer, Inner Plexiform Layer, Inner Nuclear Layer
15 May 2018
School
Department
Course
Professor
Week 5
Sensory Systems
Parts of the nervous system responsible for processing
•sight
•hearing
•taste
•smell
•touch
Overlapping systems governing other non-traditional senses, ability to detect
•temperature
•balance
•kinaesthetic sense
•pain
•vibration
Principles of sensory system organisation
•Primary sensory Cortex: input mainly from thalamic relay nuclei
•Secondary sensory cortex: input mainly from primary and secondary cortices within the
sensory system
•Association cortex input from more than one sensory system usually from the secondary
sensory cortex
Hierarchal Organisation
•Specificity and complexity increases with each level
•Sensation: detecting a stimulus
•Perception: understanding the stimulus
Association Cortex
Secondary Sensory Cortex
Primary Sensory Cortex
Thalamic Relay Nuclei
Receptors
- Functional segregation: distinct functional areas within a level
-Parallel processing: simultaneous analysis of signals along different pathways
Structures of the eye
Ganglion cell layer: Axons of Optic Nerve, ganglion cells
Inner plexiform layer: Amacrine cell
Inner nuclear layer: Bipolar cells, horizontal cell
Outer plexiform layer: horizontal cell
Outer nuclear layer: Cone
Layer of photoreceptor outer segments: Rod
Pigmented epithelium
