Attention And Performance Exam 1

Front 1

Degrees of Freedom Problem

Back 1

Physical tasks can be performed in an infinite number of ways. We choose most efficient method. Different types: obstacle avoidance, motor equivalence, efficiency, synergies, mechanics, path planning.

Front 2

Obstacle Avoidance

Back 2

More than one way to reach for an object if there are obstacles in the way. Ex. Turning on light switch with chin if hands are full.

Front 3

Motor Equivalence

Back 3

The capacity to perform a given task in a variety of ways. E.g. Writing with a pencil held in your teeth (normal writing style probably still preserved).

Front 4

Degrees of Freedom (define)

Back 4

Degrees of freedom of a system are the number of dimensions in which the system can independently vary.

Front 5

Efficiency

Back 5

We try to choose the most efficient trajectory, and eliminate awkward or inefficient movement paths. (Ex. when touching finger to nose, we don't snake a hand around the back of the head.)

Front 6

Efficiency 2

Back 6

We tend to avoid extreme joint angles, we use minimum jerk so that we move as smoothly as possible, we minimize changes in muscle torque and muscle stiffness.

Front 7

Synergy

Back 7

ex: the tendency to blink during sneezing