Sensory (5,6,7) Flashcards
What are modalities of sensation?2
Primary and cortical
What primary modalities consists of?2
Exteroreceptive sensation (superficial) and proprioreceptive sensation (deep)
Exteroreceptive sensation. What tractus? what 3 sensations?
Tractus spinothalamicus.
Touch, pain, temperature
Proprioreceptive sensation. What 2 fasciculi? what 3 sensations?
Fasciculus gracilic, fasciculus cuneatus (both in dorsal collumn of spinal cord)
Pressure, vibration, proprioreception
Which part of the brains is responsible for cortical sensory function?
Parietal lobes
Cortical sensory function. What sensations?4
Touch localization (topognosis), two point discrimination, stereognosis, spatial orientation
What is stereognosis?
Ability to identify object in the hand by feeling them without visual control
What is graphesthesia?
Ability to identify numbers and letters written on skin
What is sensory pathway to spinal cord?
Sensory receptors –> peripheral nerve –> nerve plexus –> spinal nerve –> dorsal root
In what sensory participates pseudounipolar neurons?
If makes synaptic contact with second neuron in dorsal horn –> superficial sensory
If ascends toward the brainstem nuclei –> deep sensory
Tractus spinothalamicus eiga. (neuronai)
1st - dorsal root ganglion
2nd - dorsal root
3rd - thalamus
How sensory info travels after reaches thalamus via spinothalamicus tract?
It goes to thalamocortical tract and goes to cortex (gyrus postcentralis lobus parietalis)
Fasciculus gracilis and cuneatus eiga (neuronai)
1st - dorsal root ganglion
2nd - nucleus gracilis and cuneatus in brainstem
3rd thalamus
How sensory info travels after reaches thalamus via gracilis and cuneatus?
It goes to thalamocortical tract and goes to cortex (gyrus postcentralis lobus parietalis)
From where parietal lobes receive sensory input?
From primary sensory modalities
Where in parietal lobes cortical sensory input is processed?
In sensory association cortical area
PSS. What involves mononeuritic?
Peripheral or cranial nerve impairment
PSS. What involves polyneuritic?
Multiple peripheral nerve impairment
PSS. What involves posterior root and dorsal root ganglion? ,,RADICULAR”
Dorsal root impairment in specific dermatome
What type of sensations are affected in radicular type?
All types of sensation in the appropriate dermatome
Where is the damage in central sensory syndromes but peripheral sensory loss?
In spinal cord
How is dissociated sensory loss in central sensory syndrome?
Segmental-dissociated type
Which part of spinal cord is damaged in central sensory syndromes - dissociated sensory loss?
Dorsal horn (2nd neuron)
What sensations are affected in central sensory syndrome - dissociated sensory loss?
Only superficial sensation in appropriated dermatome
