After this was revealed, #Musk stopped allowing any oversight of the clinical trials.
...Animal 15 began to lose coordination and staff observed that she would shake uncontrollably when she saw lab workers. Her condition deteriorated for months until the staff finally euthanized her. A necropsy report indicates that she had bleeding in her brain and that the #Neuralink implants left parts of her cerebral cortex “focally tattered.”...
https://www.wired.com/story/elon-musk-pcrm-neuralink-monkey-deaths/