How can Top Management bridge the communication gap that currently exists between itself and other members of staff? In a typical business environment that is? Would it be through email communication, memos, etc
The means of communication between the top management and other members of the staff will depend on the type of the organization and level of education of the rest of the staff.
The best ways are the ones that leaves the written trail but it doesn't have to be email or memos, you can create a message board where you will put the notifications to the employees. In case of the significant announcement and big changes, it is better to arrange training for employees where you can explain to them what the company requires from them.