What is the term for incoherent or illogical speech?

Disorganized speech refers to a pattern of communication where the individual's thoughts are not logically or coherently organized, resulting in a lack of clarity in their spoken language. This can manifest in various ways, such as jumping from one topic to another without clear connections, speaking in a tangential manner, or producing sentences that do not make sense. Disorganized speech is often associated with certain psychological and neurological conditions, making it an important concept in fields such as psychology, psychiatry, and music therapy.

While slurred speech includes issues with articulation that may stem from physical impairments or neurological disorders, it does not specifically relate to the logical coherence of the thoughts being expressed. Rapid speech denotes speaking at an accelerated pace, which does not inherently imply disorganization. Inarticulate speech suggests difficulty in expressing oneself clearly but does not necessarily encompass the idea of disorganized thoughts, as it may relate more to physical challenges in speech production.