Test 2.0 Flashcards
What is a vestibular reflex
When you keep your head up when falling
Why do you have reflexes in your head?
To keep your orientation to the environment
What are low level reflexes
Spinal
What is a brain stem reflex?
Protection of extension
True or false
Does everyone have a starter reflex and if so when is it the strongest?
True and as babies
What two systems are connected?
Sensory and motor
What type of reflex does star fish have
Withdrawl reflex
What is the most common sensory system
Mechanical receptor
Define mechanical receptor
A mechanic system is transduced into neural codes “generate numeral system”
Define chemoreceptors
Respond to chemical stimuli ex: taste, smell, pain
What is the first roll of sensory system
Transduction
What is transduction
The process to taking energy and then coding it into a neural activity
True or false
Can you transduce anything
True
Explain phantom pain
When you can still feel pain in an extremity that no longer exist
What type of channels do axons have
Sodium voltage dependent channels
What do dendrites allow for?
Passive potential
Where are the first nodes of raniver located
Axon hillock
Where does information comes in from and is apart of the spinal cord
Dorsal root
Where do motor neurons go out to activate muscles
Ventricular root
True or false
Axons sodium voltage dependent channels are usually open
False
They are usually closed but can be manual opened
What are mechanically gated ionic
Ion core that opens in response to being tugged on
What is a generator potential
Is a passive potential that is produced by stimulation of a sensory receptor
What is temporal submation
Stimuli in rapid succession build up enough current to he above threshold
What is spacial submation
A branch of stimuli that occur at the same time but located around the same area (goes above threshold)
What is 2 point discrimination
A test of sensory resolution
What is a receptive field
Area of receptive tissue that produces an action potential
True or false
You always have overlapping receptive fields
True
True or false
The small the distance the finer the resolution
True
True or false
The larger the distance the less finer the resolution
True
What type of myelin does proprioception have
Thick myelin
What type of myelin does pain, temp, itch have
Thin myelin
Where on your body are you most sensitive
Fingers, cheek, nose, upper lip, and toes
What is first order neurons
Project information from sensory receptors to the sensory cord and brain stem
If an axon is fat what is the resistance like and what rate is info transmitted
If it’s a fat axon it will have less resistance and transmits info fast and the opposite applys for a thin axon
Define proprioception
Sense of joint position and movement
