1. 2 The chemical senses
1.1. 2.1 Smell lecture: Taste and Smell
1.2. 2.2 Taste lecture: Taste and Smell
1.2.1. Key words
1.2.1.1. Taste receptor
1.2.1.1.1. chemoreceptor cell found on taste buds; 50-150 receptors/bud
1.2.1.2. Taste bud
1.2.1.2.1. cluster of cells embedded in skin of tongue and mouth housing taste receptors; approx 5000 on tongue
1.2.1.3. Gustatory papilla
1.2.1.3.1. Some contain free nerve endings that signal spice, tingle, coolness
1.2.1.3.2. small elevation on tongue containing 100s of taste buds
1.2.1.4. Transduction
1.2.1.4.1. initial reception of chemical stimulus
1.2.2. Receptors
1.2.2.1. Receptors in each bud form synapses with dendrites of sensory neurons
1.2.3. Cortical processing
2. 3 The body senses
2.1. 3.1 The somatosensory system lecture: Touch
3. 9 Spatial vision
3.1. 9.1 Fundamental functions lecture: Analysing Images and Human Contrast Sensitivity
3.1.1. Key words
3.1.1.1. CSF at different light levels
3.1.1.1.1. :cityscape: photopic vision
3.1.1.1.2. :city_sunset: mesopic vision
3.1.1.1.3. :night_with_stars: scotopic vision
3.1.1.2. luminance grating
3.1.1.2.1. lab stim used to study spatial vision, b/w stripes
3.1.2. Dark adaptation
3.1.2.1. Photopic → scotopic vision, >1.5hr
3.1.2.1.1. If <1.5hr e.g walking into cinema: cones adapt to lower illumination, rods function
3.1.2.2. Purkinje shift
3.1.2.2.1. Rods most sensitive ~507nm
3.1.2.2.2. Cones most sensitive ~555nm
3.1.3. Spatial contrast sensitivity Contrast sensitivity function
3.1.3.1. Spatial features defined by spatial variations of image intensity
3.1.3.2. Measure of salience: contrast between brightest and darkest parts
3.1.3.2.1. luminance grating
3.1.3.3. Contrast threshold -> contrast sensitivity: 1/CT = contrast sensitivity function
3.1.3.3.1. what determines shape?