05-02b: Prehension Flashcards
1
Q
Components of Prehension (5)
A
- Regard: Visual attention on object
- Approach: Directing/adjusting toward object
- Grasp: Closing of hand on object
- Manipulation: Moving of object as it is being held
- Release: Method by which object leaves hand
2
Q
Motor Homunculus
A
Big part of brain (motor cortex) controls hand
3
Q
Palmar Grasp Reflex (In utero)
A
- Present at birth
- As long as stimulus present, hand remains closed
- Unable to voluntarily grasp (lacks shoulder stability for skillful reaching)
4
Q
Prone on elbows
A
- Happens at 2 months; helps with shoulder stability and prehension
5
Q
Shoulder Stability Development (3 months)
A
- Allows holding UE stable for reaching
- Development of control of UE; allows child to bring objects towards him, explore with two hands
- Facilitated by WB and WS in prone on elbows and supine
6
Q
Grasping for object in space (4-5 months)
A
- Actively reaches and grasps objects in space
- Uses whole hand in palmar grasp
- Supination/pronation develops, allows placement of object in mouth
- Thumb inactive
7
Q
Progression to finger grasp (4-5 months)
A
- Grasps with ulnar digits 4 and 5
- Rakes object into hand
- Starts medial to lateral development
- Thumb inactive
8
Q
Ulnar to Radial Finger grasp (5-9 months)
A
- Increasing dominance of first two fingers (digits 2-3)
- Thumb inactive
9
Q
Finger Grasp Progress (10 months)
A
- Forefinger (index finger) active - child can poke and prod with finger (nose, eyes, ears)
- Thumb more active
- Development of pincer grasp and three jaw chuck
10
Q
Releasing grasp (11 months)
A
- Release by relaxing fingers prior to 11 months
- Volitional release begins (active extension of fingers)
11
Q
Finger grasp (18 months)
A
- Can hold pencil in center of pads with fingers
- Mark with a crayon while holding cup with other hand
12
Q
Motor Skill Development (2-7 years)
A
Development of gross motor and fine motor development specific to child’s individual play
