Neurological System Flashcards
What is the nervous system?
Is composed of a network that is inter-connected of cells and nerves, that generates signals, transmit signals, and receive signals from different body parts.
What is neurophysio goals?
- Restore function and any impairments
- Find compensatory approach to help pt achieve there goals
What sensory function helps with?
Identifying the pattern of sensory involvement and help with differential diagnosis.
Peripheral nerve involvement…
- Will demonstrate a pattern of sensory involvement that corresponds to the pattern of innervation of the affected nerve(s)
Ex - Carpal tunnel (median nerve)
Nerve root involvement…
- Will demonstrate a dermatomal pattern of sensory involvement
Dermatome: An area of skin supplied by a single nerve root
Spinal cord involvement…
- Diffuse pattern of sensory involvement below the level of lesion
- Typically bilat. and not always symmetrical
- Sensory impairments depends on the spinal tract(s) that are affected
** If unilat. likely nerve root, louder motoneurone injury
** If bilat. or quadralat. likely mylopathy or an injury of UMN (spinal cord or brain) — Refferal if they don’t already have dx
Brainstem involvement…
- Ipsi = Facial impairments
- Contralat. = Trunk and limb impairments
Brain involvement…
Cortical lesion: Impairment in dependent on area of somatosensory cortex affect
Deeper lesion: Involving thalamus and adjacent structures can lead to diffuse unilat. dysfunction
Contralat. side affected (crossing tracts)
Feedback control:
Sensory info is received during the mvt to monitor and adjust the motor output
Something happen and I react to it
Feedforward control:
Sensory info from past experiences are used for anticipatory adjustments
Why test sensation prior to Ax motor function?
Sensory input is required for performing motor task
What is the order to test sensation?
- Superficial sensation
- Deep sensation
- Combined cortical sensations
Why do sensation testing?
- Determined what are the impairments
- Differential diagnosis
- Determined what tx is appropriated and what tx is CI (Modalities)
What tests are included in superficial sensation testing?
- Pain
- Temperature
- Light touch
- Pressure
What tests are included in deep sensation testing?
- Proprioception
- Kinesthesia
- Vibration
What tests are included in cortical sensation testing?
- Stereognosis
- Tactile localization
- Two-point discrimination
- Double simultaneous stimulation
- Graphesthesia
- Recognition of texture
- Barognosis
Superficial sensation - Pain perception
- Ax sharp/dull discrimination
- Indicates function of protective sensation
- Randomly apply with EC
Superficial sensation - Tempature awareness
- Ax the ability to distinguish between hot or cold stimuli
- Randomly apply with EC
Superficial sensation - Touch awareness (light touch)
- Ax perception of tactile touch input
- Using cotton tissue, pt should respond if they believe the stimulus has been applied EC
** Diff than dermatomes
Superficial sensation - Pressure perception
- Ax perception of pressure by the deep receptors
- Apply firm pressure to the skin (firm enough to indent the skin) and ask pt to identify if stimulus has been applied EC
Deep sensation - Proprioception awareness
- Determines joint position sense and the awareness of joints at rest
- Establish the appropriate verbal responses are to the mvt that will be tested (Up/down)
- Ask at rest, when the mvt as stopped
- EC
- Grasp the joint at the sides with minimal pressure
Alternatively, the pt can mirror the position whit the opposite limb
Deep sensation - Kinesthesia awareness
- Determines awareness of mvt
- Establish the appropriate verbal responses are to the mvt that will be tested (Up/down)
- Grasp the joint at the sides with minimal pressure
- EC
- Pt determine the mvt while it’s occurring
Alternatively, the pt can mirror the position whit the opposite limb
Deep sensation - Vibration perception
- Ax the ability to perceive vibratory stimuli
- Using vibration toll
- Place the vibrating tuning fork or the base of a non-vibrating tuning fork on bony prominence
- Pt will tell if it’s vibrating or not
- Randomly, EC
Cortical sensation - Stereognosis perception
- Ax tactile object recognition
- Use familiar objects
- EC