Lec 6 part 1 Flashcards
multisensory perception
having multiple senses is beneficial, enhances ability to perceive and understand environment, enabling to better interact with surroundings
redundant target effects
statistical facilitation - both sensory elements processed along independent channels, first one to reach output stage first, triggers response
neural coactivation - activation from different channels combine in integrated response between multiple sensory
bottom up vs top down (influencing MSI)
bottom up - cannot outthink these temporal/spatial coincidence like bird flapping and making noise at same time, integrate both senses)
top down - use previous knowledge to form perception
cross-modal correspondence
subjective, natural association of stimulus i.e high pitch associated with small shape
superior colliculus
reflexive orienting to stimuli in contralateral, produce motor action guided by sensory stimuli, converge visual, audio and somatosensory projections from cortical/subcortical sources. outputs are motor control of eyes, ears and head
MS cells
input from 2 or more sensory neurons, occur from overlapping sensory fields. response from MS cells exceed sum of unisensory input
MS enhancement rules (spatial rule)
MS stimuli must occur at same region of space, when stimulus is congruent in receptive field, response stronger than sum of unisensory
MS enhancement (temporal rule)
MS stimuli must occur at same time (synchronous), if they dont arrive at same time (asynchronous) just use unisensory inputs
principle of inverse effectiveness
even if there is a weak stimuli (like soft noise), but if it is congruent / synchronous will trigger strong response like if there was a strong stimulus
superior temporal sulcus
involved in audio-speech processing - Mcgurk effect = bind A / V to make sound similar to another based off mouth movement. TMS on STS reduce effect on Mcgurk effect
