Greg Detre
3/12/99
falcons � partial colour vision (patchy spectrum)
very small cones
sinosoidal � simplest square wave (complex harmonics)
tonotopic organisation � map the cortex logically according to frequency
place-coding � point on the vibrating basilar membrane most stimulated
duplex
outer ear � not very important
3 bones � transmits sound from ear drums � oval window
20:1 compress with high energy/low amplitude � liquid
mossbauer spectrspectrometer � tiny piece of metal on the ear drum to measure its movement (transduction system)
2� turn cochlea � 2 tubes joined together at the tip
bang the oval window � thin at the bottom, fat at the top \ passive
also active tuned property to the OHCs
contract + contribute to the movement of the basilar membrane (efferent nerve)
conscious control � listen carefully � probably cortex response
listen less carefully to a familiar voice
Reissner�s membrane � separate compartment
not CSF � unique because like fluid inside cell
made by the epithelium (damaged by some drugs)
tectorial membrane � inertial mass which shears/displaces the HCs
cochlea microphone(???)- ignore
multiple synapses � integ + processing at different levels � change the control
some cross over and some stay same-side � important for sound localisation and freuqency mapping
3�h(???) inner cells
impedence � resistance to alternating current
liquid phase you�re trying to displace requires more energy to move
Vervet monkeys � 10 words vocabulary
chimps � 300 words
1000 languages in Papua New Guinea � 8 different tonal values with 1 sound