43 Questions
What is the role of the receptor in sensory perception?
To convert stimulus energy into electrical potentials
What type of signal is always present in the nervous system?
Action potentials
What is the function of the sensory unit?
To integrate sensory inputs from the environment
What is the process by which stimulus energy is converted into action potentials?
Transduction
What is the term for the area from which a stimulus can cause action potential generation?
Receptive field
What is the result of the opposite process that occurs in the brain to feel a sensation?
Perception
What is the term for the division of the nervous system concerned with sensory perception?
Sensory system
What is the sequence of events that occurs in sensory perception?
Stimulus → Receptor potential → Action potential → Perception
What is the term for the ability to process and analyze multiple aspects of a situation at once?
Parallel processing
What type of information is woven together in an instant analysis of a situation?
Separate aspects of posture, movement, and facial expression
What is simultaneously processed in visual processing?
Form, depth, motion, and color
What type of receptor detects stretch of skin and warmth or heat changes?
Ruffini ending
What is the term for the type of stimulus that causes a response with the lowest threshold?
Adequate stimulus
What is the area in the skin where different receptors or sensory units are found?
Receptor field
What mechanism is behind the adequate stimulus?
Law of specific nerve energies
Which sensation is most likely transmitted along an unmyelinated nerve fiber?
Crude touch
What is the primary function of the sensory receptive field?
Region from which a stimulus originates
What is the organization of the somatosensory system transmitted in?
Sequential manner
What is the function of initiations of arousal, affective, adaptive responses to the stimulus?
Initiating emotional responses to the stimulus
What is the result of the transmission of precise information about the stimulus?
Determination of the type, intensity, and localization of the stimulus
What is the main function of the internal representation of the body in the brain?
To aid in body positioning and movement
How are somatosensory pathways organized?
According to 3 different functions
What happens to damaged neurons when a limb is lost?
They form a mass of neural tissue called a neuroma
What is the function of continuous unconscious monitoring and control of motor performance?
Determining the resulting behavior after stimulating the sensation
What is the result of the deformation of tactile receptors in the skin?
The opening of ion channels
What is the role of the sensory receptive field in the brain?
Affecting the sensory pathways
What is the sense of touch, or tactile sense, the perception of?
Objects that come into contact with the skin
What is the purpose of parallel organization in the somatosensory system?
To carry several submodalities in separate parallel channels
What is the result of the intention to move a phantom limb?
The generation of pain
What is a neuroma?
A mass of neural tissue
What happens when a stimulus is strong enough to cause cellular depolarization?
Action potentials are generated
What is the role of the brain in the sense of touch?
To receive and interpret action potentials
What is the diameter range of A-α fibers?
13-20 um
Which type of receptor is responsible for proprioception?
Muscle spindle
What is the velocity range of A-β fibers?
75-35 m/sec
Which receptor is responsible for superficial touch?
Meissner’s corpuscle
What is the diameter range of A-δ fibers?
1-5 um
Which type of receptor is responsible for deep touch and vibration?
Pacinian corpuscle
What is the velocity range of A-δ fibers?
30-6 m/sec
Which type of receptor is responsible for pain and temperature (cool)?
Naked (bare) nerve endings
What is the diameter range of C fibers?
0.5-1.5 um
Which type of receptor is responsible for itch?
Naked (bare) nerve endings
What is the velocity range of C fibers?
2-0.5 m/sec
This quiz covers the process of transduction, where stimulus energy is converted to action potentials, and how these signals are transmitted through the nervous system.
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