Sensory Nervous System Flashcards
Proprioception is
Detecting relevant position
The somatic nervous system is divided into:
Sensory and motor NS
In the sensory nervous system what is the major relay centre
Thalamus
How many neurones in the sensory pathway
3
Which type of nerve endings detect pain/nociceptor
Free nerve endings - uncapsulated
What do encapsulated krause end bulbs detect
Temperature
What do nociceptors detect
Damage in stimulus
What senses does the dorsal column pathway relay
Fine touch, limb position
Which senses does the spino-thalamic pathway relay
Pain
Temperature
What chemicals are released by damaged tissues
Histamine
Bradykinin
Prostaglandins
Leukotrienes
Which nerve fibres send fast, sharp pain
A delta
Which nerve fibres send slow pain
C
What type of pain indicates tissue damage
Fast pain
Chronic pain lasts for
> 6months
The sensory cortex is located in the
Post central gyrus
What are the two functional parts of the somatic nervous system
Motor and sensory
Nociceptors are sensitive to
Chemical substances released by damaged cells
What are the free nerve endings of myelinated fibres
Nociceptors
In the sensory pathway 1o neurons have a receptor in the …, cell body in the … or sensory ganglion in the …
Periphery
Dorsal root ganglion
Head
What is the correct pathway from the nociceptors to the brain
Nociceptor - dorsal norm - spino thalamic tract - ventral posterior lateral nucleus in the thalamus - sensory cortex
