Elbow and Shoulder Componentry

A friction elbow unit would be most appropriate for what kind of user?

low impact users, pediatric users, cosmetic restoration users, and brachial plexus users

Describe the ENER elbow joint

passive locking joint that absorbs shock in heavy duty activities

Explain how Inside-Locking Elbows work

a cable/string is attached to an elastic strap that is placed over the shoulder

• small excursion locks and unlocks joint

For elbow flexion assist units, how does it work and where would the user have the most lifting force?

lifting force adjusted via a spring

• most lifting force when elbow is in full extension (spring is compressed)

Explain the counterbalance mechanism for elbow joints

helps the user perceive the prosthetic forearm, wrist, and TD as the same weight through the elbows motion

Describe hybrid elbows

elbow unit is controlled via body powered but also has has internal electronics that control wrist + TD

Describe the Bulkhead shoulder joint

shoulder joint that only allows flexion and extension

Describe the single axis shoulder joint

only allows shoulder abduction

Describe the double axis shoulder joint

allows flexion and abduction

Describe the Universal Shoulder Joint

allows flexion, abduction, and rotation