Lec 4: Neurophsyiology Part 3: Sensory and Motor Systems Flashcards
What are a few characteristics of the Autonomic Nervous System?
Involuntary, reflexive activity on organs and blood pressure
What is the purpose of the Sympathetic System?
Mediates ‘Fight or Flight Response’, increasing heart rate & dilating bronchioles of lungs for more oxygen
What is the purpose of the Parasympathetic Nervous System?
“Rest & Digest” System; Returning Blood flow to Gi Tract & Skin
What is the purpose of the Enteric System?
Directly controlling the GI System
In Sensory Transduction, Sensory receptors change physical energy into electrochemical energy. This includes Mechanoreceptors. What is included in the Mechanoreceptors?
Touch, Pain, and Temperature
What are the (4)classes of receptors?
Mechanoreceptor (Touch, Balance, Proprioception, Pain)
Chemoreceptor (pain, Taste, Sell, Chemical Stimuli)
Photoreceptor (Sight)
Thermoreceptor (Temperature, Pain)
In terms of Sensory Conduction, why is proprioception more important than main when it comes to myelinated and unmyelinated axons?
Allow reflexes to react before the possibility of pain
In touch receptors, what is the frequency of Meissner’s Copuscle?
Low Frequency
In touch receptors, what is Pacinian Corpouscle?
High Frequency vibration=Fast Reacting
In terms of Ruffini Corpuscle, what is its reaction?
Steady Skin is greater than slow reacting
In pain and thermal, what is nociceptors?
pain sensors
What is a response to nxious stimuli?
Mechanical -Strong stimuliation
Thermal: above 45 degrees Celsius
What are polymodal Nociceptors?
Mechanical, Heat, and Chemical
What are the (4) components of sensation?
Vision, Hearing, touch, taste, smell proprioception
What is Modality in sensory coding?
Everything that goes to the brain is labels
What is an example of fast sensory coding?
touching finger is quick in responding
What is an example of slow sensory coding?
Telling brain to no longer use fast coding, and use slow when allowing an action to occur after a long period of time
Example: Holding a cup in your hand for a long time
what are the (3) main sensors of Proprioception?
Muscle Spindles
Golgi Tendon Organs
Joint Recpetors
***Look at notes in Muscle Spindles &Golgi Tendon Organs
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In vision, what are the (2) types of photoreceptors?
Rods : Night vision
Cones Day vision
Define Perception
Making meaning of sensation
Define Sensation
Transforming physical stimuli to internal representations “neuron signals”
What are (4) parameters of Perception?
Detection: Is there a stimulus?
Discrimination: One or two stimulus? same or different?
Recognition: Relate stimulus with something in your memory
Scaling: Ability to compare (2) similar, yet different stimuli
What does Weber’s Law state about weight discrimination? Provide Example
The larger the weight, the less noticeable it is to discriminate the weight change
What are (3) types of motor systems?
Reflexive (Involuntary& fast)
Voluntary (goal, improved with patients, learned)
Rhythmic Activity (combination of reflex and voluntary)
What the Weber-Fechner Law?
A relationship between a stimulus and their strength is created and the perception of the stimulus diminishes.
