A photographic device is attached to the limb in motion that registers the pathway of light projected by electric bulbs to analyze the pattern of rhythm in movements. The technique is called:

Correct option is A

The technique described is known as Cycle graph. It involves attaching a photographic device to the limb in motion to capture the pathway of light projected by electric bulbs. This allows for the analysis of the rhythm or pattern of movements, especially in studies of motion, rhythm, and biomechanics. The cycle graph records the movement as a continuous trace, often displayed on a photographic film or a similar medium.
Information Booster:
· Cycle graph (a): This method is used in motion analysis to study the movements of a body part or limb. The device records the path traced by light or ink, helping researchers visualize and analyze the motion and rhythm of movement patterns over time.
Additional Knowledge on Incorrect Options:
· (b) Pathway chart: This term is not associated with the specific photographic technique described. It is more general and could refer to diagrams or charts illustrating routes or paths in different contexts, but not the motion analysis technique described.
· (c) Micromotion film analysis: While micromotion film analysis can be used to study small-scale movements or intricate details of motion, it doesn't involve the specific pathway light technique described in the question.
· (d) Memo motion film analysis: This is not a recognized term in the field of movement analysis. It is likely a confusion with other motion analysis techniques but does not specifically refer to the described method of recording light patterns.