-The human olfactory system is capable of sensing and distinguishing about 10,000
-For a substance to be smelled, some of its molecules must vaporize (pass from a
solid of liquid to a gaseous state)
The Sense of Smell
-term sensitization (mins)
Mediated by synaptic enhancement at sensorimotor synapses
Facilitator interneuron makes synapse on terminal of siphon sensory neuron
Enhances transmitter release by sensory terminal
-A German word that refers to the whole form, pattern, or configuration a
When viewing the world, some object (the figure) often seems to stand out from the
background (the grou
-Why is pain adaptive?
-It motivates us to engage in recuperative behaviors.
-It teaches us to avoid pain
-producing circumstances in the future
-Pain that persists for 3 months or more.
-Three major types
Mammalian Synaptic Plasticity
D.O. Hebb proposed in 1949 a rule for synaptic modification
If one cell repeatedly takes part in firing another cell
Connection between the two cells becomes strengthened
Neurons that fire together wire together
LTP and Learning
Is hippocampal LTP a memory mechanism?
NMDA receptor antagonists block LTP and learning that requires the
-like increases in hippocampal activity occur during learning
Mice lacking genes for proteins required for LTP dont
Influences on Perception
-Enhances or leads to perceptual errors.
-Looking for patterns in individual bits of information that can be interpreted
using prior knowledge.
-Previous experience and
Emotional expression serves to communicate information
Forms of expression
Posture, gesture, facial expressions
Laughter, screams, ultrasonic
It is adaptive to communicate emotion
Human Facial Expression
-Unable to taste certain sweet and bitter compounds; less sensitive to other
-Taste sweet and bitter compounds with strong intensity.
-Taste sweet and bitter with average intensity.