What is the difference between aphasia vs. dysarthria, dysphasia or apraxia?

What is the difference between aphasia vs. dysarthria, dysphasia or apraxia?

Aphasia is a condition that has a connection or an overlap with several other speech-related disorders and problems, such as dysarthria, dysphasia and apraxia.

• Aphasia: This is the overall term for a brain-connected problem with language abilities, including speaking or understanding other people speaking. Experts use this term for full or partial loss of language abilities.
• Dysphasia (dis-fay-zh-ah): This is an outdated term for partial loss of language abilities from a brain-related problem. Use of this term isn't common in most places. A major part of why it fell out of use is the risk of confusion with the term “dysphagia” (see below).
• Dysphagia (dis-fay-gee-uh): This is the medical term for a problem with swallowing. The ability to swallow relies on specific muscles to push food, liquid, medication, etc. down your throat. Dysphagia can happen with brain or nerve disorders or problems with the muscles themselves.
• Dysarthria: This is when you have trouble speaking because you can’t fully control parts of your mouth, face and upper respiratory system. This can make you speak too loudly or softly, at uneven speeds, mispronounce words, or have unusual changes in pitch (changing between high- or deep-sounding voices).
• Apraxia: This is a problem where you can’t do something even though you have learned how to do it or have done it before. An example would be suddenly not knowing how to use a key to open a locked door, even though you have no problem describing the action and still know how a lock and key work. People with apraxia often have trouble saying words correctly.