Week 8 Flashcards
The hand provides…
A. Support
B. Manipulation
C. Prehension
D. All of the above
D. All of the above
Prehension
in relation to the hand
The ability of the fingers and thumb to grasp or seize, holding, securing, or picking up objects
Power grip: a fist with intrinsic and extrinsic…
A. Extension
B. Flexion
C. Abduction
D. None of the above
B. Flexion
Power grip: a fist with intrinsic and extrinsic flexion
The precision grip is a blank grip with blank hand muscles.
The precision grip is a light grip with small hand muscles.
Grasp
Use of entire hand to hold an object
Pinch
Varying use of thumb, index finger, and middle finger for precise object manipulation
What are different grasp patterns?
Cylindrical
Spherical
Hook
Composite
Cylindrical Grasp
Midrange flexion of digits
Grasping a tube-shaped object
Ex. Turning steering wheel
Spherical Grasp
Varied flexion of digits
Grasping a rounded object
*Ex. Holding underside of bowling ball, unscrewing a lid
Hook Grasp
Simultaneous flexion of PIPs and DIPs
Extension of MCPs
Ex. Carrying a bucket
Composite Grasp
Maximal Flexion of all digits
Ex. Wringing out a towel
What are different pinch patterns
Tip
Three-Jaw Chuck
Lateral (key)
Tip Pinch
Precise movements
Distal tips of thumb and index finger
Ex. Threading a needle
Three-Jaw Chuck Pinch
Tripod Pinch
Tip of thumb against tips of index and middle fingers
Ex. Writing with a pencil
Lateral (key) Pinch
Pad of thumb against radial side of index finger
Ex. Unlock a door witha key, using a fork
Smith’s Fracture and
Colles’ Fracture are what types of fractures?
Distal Radius Fracture
Smith’s Fracture
Volar displacement of distal bone
Colles’ Fracture
Dorsal displacement of distal bone
Osteoarthritis
Wear-and-tear arthritis
Painful and debilitating
CMC joint of thumb is most common site in the hand
Cumulative Trauma Disorders
Develop over time
Due to microtrauma from repetitive use
Ex. De Quervain’s tenosynovitis
DeQuervain’s Tenosynovitis
Inflammations of APL and EPB tendons in the 1st dorsal compartment
What is DeQuervain’s Tenosynovitis caused by?
Activities that involve ulnar deviation and repetitive thumb movements
How are Peripheral Nerve Injuries Caused?
Nerve Compression
Nerve Damage
Nerve Laceration
*Characteristic sensory&motor loss based on location of the nerve injury
Radial Nerve Injury
Radial nerve motor impairment
Loss of wrist, digit, and thumb extension
What type of radial nerve injury will result in more involvement of loss of wrist and hand extension?
A. Distal
B. Proximal
C. Medial
D. Both A & B
B. Proximal
Proximal radial nerve injury will result in more involvement of loss of wrist and hand extension
A more distal injury will result in loss of digital extension
What are some types of peripheral nerve injuries?
Radial Nerve Injury
Ulnar Nerve Injury
Median Nerve Injury
