Week 6 : Retraining Sensory, Perceptual and Behavioural Deficits Flashcards
List the 2 types of somatosensory impairments
proprioception
tactile impairments
Proprioception is made up of a range of sensations including
recognition of movement movement heaviness awareness of movement direction position in space sense of force timing of muscular contraction
Proprioception is critical to multisegmental movements
give a couple of examples
STS stand to sit manipulation gait balance
loss of proprioception is associated with what
poor motor function and reduced functional independence
sensory loss in proprioception impairments can be very specific, give an example
patient may recognise limb movement and position, but not movement direction
Tactile functions
sensory functions involve localisation and discrimination of stimuli
Is tactile function more essential in UL or LL?
UL
Difficulty in sustaining muscular contraction without tactile feedback results in what
slowness and clumsiness in many manual tasks
sensory impairments are linked to poor spontaneous limb use, T or F?
T
Functional impact of somatosensory impairments
relationship between motor and sensory function
impairments may be a major cause of functional disability
Individuals may recover the ability to activate muscle groups and control their limbs, however their activity and participation may still be very restricted in their natural environment
Tactile and proprioceptive sensation are critical to regaining effective motor function, especially upper limb
Somatosensation is required for the learning of new skills
Sensation functions in both regulatory and adaptive modes, guiding movements during their execution and correcting movements in order to improve the next attempt
give an example of the functional impact of somatosensory impairment
a patient may be able to effectively perform all components required for drinking, however poor sensory feedback may result in them dropping their glass
a patient may effectively mobilise on stairs, however when stepping down a curb poor sensory feedback may result in fear and reduced confidence
Assessment of somatosensory impairment
largely subjective
reliability and validity unconfirmed
common tests developed for peripheral lesions
cerebral lesions- emphasis needs to be on how stimulus is perceived and interpreted, not just nerve conduction
important to conduct thorough Ax of sensation
inc Hx of sensory loss and recovery, prognostic importance and treatment effectiveness
Determine how sensory impairments relate to performance of functional activities and participation
Specific assessments of somatosensory impairments
light touch double simultaneous stimulation stereognosis pinprick temperature
rehabilitation of somatosensory impairments
- founded on the assumption that sensory activation is specific to the task and the environment in which it is being performed
- system is selective in the inputs utilised for specific functional activities
meaningful task practice
- task oriented training is directed toward enabling the patient to perform critical everyday actions more effectively and efficiently in the relevant environment and involves practice of the actions themselves (+/- action/ environmental modification)
During rehabilitation of somatosensory impairments, the pt must be an active participant because
non specific stimulation of a passive recipient is unlikely to affect the awareness of specific sensation
cognitively directed approach to motor training is required
pt’s need challenging and meaningful functional based rehabilitation with pt attending to sensory inputs and their relationship to the task, give an example
STS practice provides the opportunity to be aware of inputs from tactile and pressure receptors in the soles of the feet and kinaesthetic input from muscle and joint receptors, and may assist in limb positioning and loading
Visual impairments
- visual field loss
Vision is our major source of information about the environment and our place in it
Eye-head coordination is particularly critical for manipulating and negotiating the environment
Neurological lesions may result in oculomotor dysfunction (double vision, impaired saccadic movement), dry eyes or cognitive and perceptual manipulations of visual inputs (e.g. visual field loss, visuospatial agnosia)
Loss of visual information from half the visual field is not uncommon following stroke
Review slide 16 on visual field defects
especially for end of term exam
functional impact of visual field loss
Visual impairments have a negative impact upon a patient’s ability to engage actively in rehabilitation and participate in activities of daily living
The ability to locate and maintain stable gaze on a fixed target, and to move eyes while keeping the head still in order to locate objects in the peripheral field is critical to functional task performance
Movement is guided by visual information about the location of an object and the body, and about the relationship of different body limbs and segments
Visual impairments may result in a patient bumping into objects, missing utensils on a table, having difficulty reading etc
Specific assessment for visual field loss
Subjective examination (pre-existing visual impairments and management strategies in place)
Visual acuity
Eye movements (CN III, IV, VI)
Visual fields
must be informed about the state of the patient’s visual system, given its critical role in movement control
Rehabilitation of visual field loss
Ensure pre-existing visual impairments are corrected (e.g. glasses in situ)
Understand specific visual impairments to give consideration to environmental factors such as glare and lighting during motor training
Compensation training is usually necessary
– Encourage eye and head movements to bring objects into view
– Encourage patient to pay attention in detection tasks
List the three perceptual-cognitive impairments
apraxia
visual perceptual impairments
unilateral neglect
What is apraxia
difficulty performing everyday activities not accounted for by weakness, sensory loss, incoordination, inattention or lack of comprehension
list two types of apraxia
ideational apraxia
ideomotor apraxia