Did you know that not all BPPV is the same and there are actually different types of BPPV? BPPV (Benign Paroxysmal Positional Vertigo) can affect different semicircular canals in the inner ear. The type of canal involved determines:
- The direction of eye movements (nystagmus)
- The positional pattern of dizziness
- The specific repositioning manoeuvre used for treatment
Understanding the canal involved allows treatment to be precise and effective.
The Three Semicircular Canals
Each inner ear contains three circular canals:
- Posterior canal
- Horizontal (lateral) canal
- Anterior (superior) canal
These canals detect head movement in different directions.
When displaced crystals enter one of these canals, BPPV develops.
1️⃣ Posterior Canal BPPV (Most Common)
This is the most common type of BPPV (about 80–90% of cases).
Typical Symptoms
- Spinning when turning in bed
- Vertigo when looking up
- Symptoms lasting seconds
Treatment
The most commonly used treatment is the Epley manoeuvre, which rotates the head through a sequence of positions to guide crystals out of the posterior canal.
2️⃣ Horizontal Canal BPPV
Horizontal canal BPPV accounts for approximately 10–20% of cases.
Typical Symptoms
- Intense spinning when rolling left or right
- Symptoms may feel stronger than posterior canal BPPV
- Often triggered during bed mobility
Treatment
Treatment usually involves the Gufoni or the Barbecue Roll (BBQ Roll) manoeuvre.
3️⃣ Anterior Canal BPPV (Rare)
Anterior canal involvement is uncommon.
Typical Symptoms
- Vertigo when looking down
- Less common presentation
- Requires careful assessment to differentiate
Treatment
Modified repositioning maneuvers are used like the deep head hang maneuver, depending on the direction of nystagmus observed during testing.
Treatment selection is based on clinical assessment and nystagmus findings. Vestibular physiotherapists are trained in multiple repositioning techniques and choose the most appropriate manoeuvre for each individual case.
Why Identifying the Correct Canal Matters
Different canals require different repositioning strategies.
Using the wrong manoeuvre may:
- Fail to resolve symptoms
- Convert BPPV from one canal to another
- Prolong symptoms and delay recovery
A thorough positional assessment ensures accurate diagnosis and targeted treatment.
However, it is not only about which canal is involved — it is also important to determine how the crystals are behaving inside the canal.
BPPV can occur in two forms: Canalithiasis vs Cupulolithiasis
BPPV can also differ based on how the crystals behave.
🔹 Canalithiasis (Floating Crystals – Most Common)
- Spinning starts shortly after moving into a triggering position
- Dizziness is brief (usually less than 30–60 seconds)
- Symptoms settle even if you remain in the position
- Often feels intense but short-lived
This is the more typical and easier-to-treat form of BPPV.
🔹 Cupulolithiasis (Stuck Crystals)
- Spinning begins almost immediately when in the triggering position
- Dizziness lasts longer (often 1–2 minutes or as long as the head stays in that position)
- Symptoms may feel more persistent
- May feel harder to “wait out”
Because the crystals are stuck rather than floating, symptoms may last longer and treatment can require more targeted manoeuvres. This explains why recovery may vary between individuals.
What Does This Mean for You?
If your dizziness feels different from someone else’s, that’s normal.
The specific canal and crystal behaviour determine:
- The pattern of symptoms
- The type of repositioning used
- The number of sessions required
With accurate assessment, most forms of BPPV respond well to targeted treatment.