Touch
Most skin includes tactile receptors because they respond to mechanical stimulation or pressure. What are these sensory receptors called?
What are mechanoreceptors?
The ability to sense changes in temperature on the skin
What is Thermoreception?
The perception of the movements and position of our limbs
What is Proprioception?
Perception requires your attention and is this type of process.
What is an active process?
This occurs when we try to attend to competing sources of information.
What is Divided attention?
An area in the parietal lobe of the cerebral cortex devoted to processing the information coming from the skin senses
What is The somatosensory cortex?
This refers to experiencing pain in a limb that has been amputated
What is Phantom limb pain?
A drawing of a human in which the proportions of the body parts match the relative sizes each body part has on the somatotopic or motor map.
What is homunculus?
This refers to a state of vigilance.
What is Alertness?
The features of objects in the environment that attract our attention
What is stimulus salience?
The heaviest organ in the body.
What is the skin!(~9 lb)
Pain that develops from tissue damage that causes nociceptors in the skin to fire
What is Nociceptive pain?
This organ in your body has no pain receptors.
What is the brain!
This refers to an active thought about something.
What is Awareness?
A phenomenon in which people fail to perceive an object or event that is visible but not attended to.
What is Inattentional Blindness?
The transduction cells in FAI mechanoreceptors that are important for maintaining grip.
Useful in avoiding dropping objects, because they detect an object as it begins to slip away from your hands.
What are Meissner corpuscles?
FA = Response to start/end of stimulus
I= Small receptive fields & high spatial resolution
This area of the brain shows activation for both pain and observing another experience pain.
What is the ACC Anterior Cingulate Cortex?
This type of nociceptor is not myelinated and respond to pressure, extreme degrees of either heat or cold, and toxic chemicals.
Feels like a throbbing pain after initial damage.
What are C-fibers.
A-delta fibers = myelinated nociceptors that conduct signals rapidly and respond to both heat and pressure
The processes of attention that allow us to focus on one source when many are present.
What is Selective attention?
This model argues that attention focuses on one location in visual space and allows us to process information better there
What is the spotlight model?
The 4 MAIN types of mechanoreceptors involved in touch. (MUST KNOW WHAT THE ABBREVIATIONS STAND FOR)
What are:
Slow Adapting & Fast Adapting
SAI mechanoreceptors
SAII mechanoreceptors
FAI mechanoreceptors
FAII mechanoreceptors
Pain caused by a lesion or disease of the somatosensory nervous system
What is Neuropathic pain?
Once in the spinal cord, touch information proceeds to the brain via these two major pathways
What are
Spinothalamic pathway —> a pathway for the thermoreceptors and nociceptors
&
Dorsal column-medial lemniscal pathway —> a pathway for the mechanoreceptors (tactile perception) and proprioceptors (muscle position)
A condition in which a person fails to attend to stimuli on one side of the visual world (usually the left) as a consequence of neurological damage to the posterior parietal lobe
What is Hemispatial Neglect?
Two primary attention networks in the brain.
Orienting Attention Network (OAN) & Executive Attention Network (EAN)