Lecture 9 Flashcards
What do peripheral nerves contain?
Axons, Schwann cells, connective tissue and blood vessels
If a stimulus is continuous for a period of time, the neural response becomes diminished. This is termed?
Receptor adaptation
What are the receptors associated with skin, pressure and vibration?
Hair follicle receptors, Mesissner’s corpuscles, Pacinian corpuscles, Ruffini’s endings, Merkel’s nerve endings and free nerve endings
What are termed encapsulated endings?
Meissner’s corpuscles, Pacinian corpuscles and Ruffini’s endings
What are hair follicle receptors called?
Peritrichial endings
Where are Meissner’s corpuslces found?
Glabrous skin, in dermal papillae
What surrounds a Meissner’s corpuscle?
Connective tissue sheath
What are Meissner’s corpuscle sensitive to?
Touch and vibration
Where are Pacinian Corpuscle found?
Deep in the dermis
Examples of where Pacinian corpuscles could be found?
Joint capsules, mesentery and periosteum surrounding bone
What do Pacinian corpuscles respond to?
Pressure and vibration
What provides information to the muscle about the velocity of change of length in the muscles?
Muscle spindles
What fibres are within muscles spindles?
Intrafusal fibres
What are the two types of intrafusal muscle fibres?
Nuclear chain fibres and nuclear bag fibres
What are the two types of sensory axons in the muscle spindle?
Annulospiral endings and flower spray endings
