The majority of all objects JH touched with his left hand went unrecognized, but very simple objects (i.e. globes, pyramids, cube, etc.) were regularly recognized based on form alone. For more complex objects, his behavior and recognition varied daily based on his tactile resources that changed over time and depended on his fatigue. That is, JH’s ability to recognize depended on his concentration and ability to recognize simple forms and single qualities like size, shape, etc. With further interrogation and greater effort, he was able to correctly identify more specific features of an object (i.e. softness, rounded or cornered, broad or narrow) and could even draw a copy of it, but he was often left unable to identify the object by name, use, or origin. This behavioral deficit occurred even if JH had handled the object in his fully intact right hand.
