6. Which of the following sub-modalities is not processed by the somatosensory system?
Temperature
Touch
Head motion
Nociception
7. Which of the Brodmann's areas in the primary somatic sensory cortex contains neurones with more complex receptor fields?
1
2
3a
3b
4
8. In the homunculus, the body areas are represented with regards to what?
Tactile Sensitivity
Skin Area
9. What is the function of the dorsal horn of the spinal cord?
Sensory
Motor
10. Which of the following is not true for rapidly adapting receptors and is true for ONLY slowly adapting receptors?
It characterised by a burst of action potentials which rapidly decays
It is part of a peripheral mechanism to inhibit sensory information so the brain is not overloaded
The receptor encodes the duration and intensity of stimuli
The receptor encodes the dynamic features of stimuli
11. What information does the dorsal column system NOT convey?
Vibration
Pain
Proprioception
Fine (discriminative) touch
12. What mechanism do the centre/surround receptor fields exhibit? (These receptor fields are present in the dorsal column nuclei and thalamic neurones
Medial Excitation
Medial Inhibtion
Lateral Inhibition
Lateral Excitation
13. Where is the VPL nucleus located?
Brainstem
Thalamus
Cerebral Cortex
Spinal cord
Hypothalamus
14. The gracile nucleus conveys sensory information from the?
Lower limbs and lower trunk
Neck, upper limbs and upper trunk
15. Where are receptor fields smallest?
Where the surface area of the skin is large
Where the least discrimination is required
Where the most discrimination is required
Where the surface area of the skin is smal
16. Which rexed laminae surrounds the central canal of the spinal cord?
X
I to VI
VII
VII to IX
17. As the sensory pathways ascend, the receptor fields of the neurones become...?
More complex and smaller
More complex and larger
Less complex and larger
Less complex and smaller
18. Which of the following do mechanoreceptors and chemorecptors have in common?
When unstimulated, the ion channel is closed
The ion channel is also the receptor
The stimulus acts directly on the ion channel
The stimulus is the binding of a molecule
19. How is the modality of a stimuli represented by the electrical 'code' generated by the peripheral receptors in response to a stimuli?
By the duration of the action potential
By different types of sensory receptor and different sensory pathways
By the mean frequency of action potentials
By the localised area in which the receptor can be activated
20. Which of the muscle and joint mechanoreceptors is responsible for the detection of joint position and movement?