Forces that act on the prosthesis during the manipulation of heavy objects can cause a displacement of the prosthetic socket relative to the arm stump. In consequence, the control signals recorded by traditional surface EMG can become unreliable leading to unsatisfactory function of the prosthesis.

In this task, a series of bottles of different weights must be placed in a bottle crate and the crate must then be carried to a shelf, removed from the crate and placed on top of it. 

Cooking often involves grasping and carrying objects (e.g., pans) of significant weight from one location to another while it must be made sure that none of the content is spilt.

In this task, a casserole dish and a frying pan must be carried from the stove to a predefined location on a table.

Kitchen work oftentimes includes manipulating objects in confined spaces and at various heights, e.g., when grasping objects that are placed inside a cupboard.

In this task, typical kitchen objects must be grasped and stowed away at predefined target locations. 

Handling laundry and putting on clothes requires a distinct set of fine motor skills, in particular in the fingers. Furthermore, for an arm prosthesis to be practical for daily use it must be compatible with standard clothes.

In this task, the pilot must put on a hooded sweater and fully close the zipper. Then, the pilot must hang up the hooded sweater on the clothesline using a hanger. Finally, the pilot must hang up a t-shirt on the clothesline using blue clothespins.

The dexterous use of hand tools requires a prosthetic hand and wrist that provide active motion about multiple axes (pronation/supination, palmar flexion/dorsal extension, and radial and ulnar abduction). Since hand tools are often used in confined spaces the active control of many degrees of freedom becomes even more important.

In this task, pilots must use a variety of hand tools in the context of do-it-yourself type work.

The ability to use kitchen utensils (e.g., cutlery, a can opener) is critical for independent living and involves countless tasks which are typically solved by dexterous bimanual interaction. Also, some objects in the kitchen are very delicate to handle and require very precise control of grip force.

In this task, pilots must conduct a series of kitchen-related bimanual tasks. 

The availability of sensory feedback can improve a user’s control over the prosthesis and increase the acceptance and embodiment of the device.

In this task, pilots must recognise and retrieve objects of different shapes and compliance in the absence of visual feedback.

Maintenance of a tight grip during sustained postural changes of the arm (e.g., pronation and supination of the forearm, elbow flexion and extension) can be challenging for prosthetic hand users but is relevant in many situations in daily life (e.g. when picking up the phone or painting).

Pilots hold a conductive wire loop with a blue handle. A curved metal wire must be tracked without touching the wire with the loop by using the prosthetic hand only.

Maintenance of a tight grip during postural changes of the arm (e.g., pronation and supination of the forearm, elbow flexion and extension) can be challenging for prosthetic hand users but is relevant in many situations in daily life such as when pouring liquids or turning objects.

In this task, pilots sit in front of a table and must stack blue cups into a vertical pyramid.

Kitchen work oftentimes includes manipulating objects in confined spaces and at various heights, e.g., when grasping objects that are placed inside a cupboard.

In this task, typical kitchen objects must be grasped and stowed away at predefined target locations.