I definitely had dizziness/vertigo type problems when my RSI /TOS came on {03}- and had sx of dizziness on and off for about 8 months.
they kept me working with modified duties & PT for months but I continued to have increasing pain and symptoms that I was finally "off work".
and the PT could do some actual good for me instead of just maintaining (losing ground}.

Did you see the link about the Vertebral Artery symptoms?
http://tos-syndrome.com/newpage12.htm
shows TOS sx in a nice chart

DIPLOPIA, DYSARTHRIA, DYSPHONIA, DYSPHAGIA info -
Diplopia is double vision caused by a defective function of the extraocular muscles or a disorder of the nerves that innervate (stimulate) the muscles.
Description of Diplopia
A transient episode of diplopia is usually of no clinical significance, indicating only a brief relaxation of the fusion mechanism of the central nervous system that maintains straightness.
http://www.healthscout.com/ency/68/671/main.html

Dysarthria is a motor speech disorder. The muscles of the mouth, face, and respiratory system may become weak, move slowly, or not move at all after a stroke or other brain injury. The type and severity of dysarthria depend on which area of the nervous system is affected.
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What are some signs or symptoms of dysarthria?
A person with dysarthria may experience any of the following symptoms, depending on the extent and location of damage to the nervous system:

* "Slurred" speech
* Speaking softly or barely able to whisper
* Slow rate of speech
* Rapid rate of speech with a "mumbling" quality
* Limited tongue, lip, and jaw movement
* Abnormal intonation (rhythm) when speaking
* Changes in vocal quality ("nasal" speech or sounding "stuffy")
* Hoarseness
* Breathiness
* Drooling or poor control of saliva
* Chewing and swallowing difficulty
http://www.asha.org/public/speech/di...dysarthria.htm

Spasmodic dysphonia (SD), a focal form of dystonia, is a neurological voice disorder that involves involuntary "spasms" of the vocal cords causing interruptions of speech and affecting the voice quality. SD can cause the voice to break up or to have a tight, strained, or strangled quality.
http://www.dysphonia.org/

Dysphagia is a medical term defined as "difficulty swallowing". It derives from the Greek root dys meaning difficulty or disordered, and phagia meaning "to eat". It is a sensation that suggests difficulty in the passage of solids or liquids from the mouth to the stomach. Dysphagia is distinguished from similar symptoms including odynophagia, which is defined as painful swallowing, and globus, which is the sensation of a lump in the throat. It is worthwhile to study the physiology of swallowing to better understand dysphagia.
http://dysphagia.com/

I had all of those except double vision - I did have very blurry vision {close/reading} and watery eyes though.
Much of those sx resolved with the PT, chiro and doing Trigger point release myself {w/tennis ball, dog ball {mix of sizes} against wall or floor}
So mine was a mix of spasms/tight muscles where trigger points developed, causing referred pain and symptoms, as well as the pulling tension on the c spine vertebrae.
this link shows a chart { click able} about TRPs and referred pain/symptom sties-
http://www.pressurepointer.com/pain_reference_chart.htm
more in this post-
http://neurotalk.psychcentral.com/post388-1.html