Fine motor (week 4) Flashcards
The function of the hand: Prehensile
(grasp/capture)
- Shape itself around objects
- Shape itself on top of surfaces
- Accommodation (Erhardt)
Function of hand: Non-prehensile
Pushing, lifting with whole hand
Function of hand: Perceptual
Haptic sense
Active touch
Stereognosis
Motor requirements for hand function
- Dynamic palmar arches
- Combined movements of wrist and forearm
- Reach
- Weight bearing and proximal stability
Motor tracks: Brainstem
posture and proximal control
Motor tracks: reticulospinal tract
Pontine, reticulospinal connections. Exert generalized inhibition of muscles in body.
Motor tracks: Vestibulospinal tract
Muscle tone, postural control, adjustment, stability and balance, extensors
Motor tracks: Rubrospinal tract
(Red nucleus)
-Spinal flexors
Motor tracks list
Brainstem, reticulospinal tract, vestibulospinal tract, rubrospinal tract
Cortex
Related to precision, speed, and isolated distal movements (Corticospinal/pyramidal)
Sensory tract: Dorsal column medial lemniscus (DCML)
Touch, vibration, 2-point discrimination and proprioception
Sensory tract: Anterolateral/Spinothalamic tract
Pain and temperature
Bones in hand
27
Extrinsic muscle feature
Muscle bellies are in forearm
Intrinsic muscle features
Distal to wrist joint, originate in hand, form arches of hand