D'Attilio M, et al.  The influence of an experimentally induced malocclusion on vertebral alignment in rats: a controlled pilot study.  Journal Craniomandibular Practice, 2005. 23(2):119-129.
   Korbmacher, H., et al., Correlations between anomalies of the dentition and pathologies of the
locomotor system-a literature. J orofac orthop, 2004. 65(3): p. 190-203.
   Seemann, D.C., The biomechanics and neurological aspects of the Atlas Subluxation Complex. The
Upper Cervical Monograph, 1977. 2(2): p. 3.
   Thomas MD, Wood J, 1992.  Upper Cervical Adjustments May Improve Mental Function.  Journal Manual Medicine, 6:215-216.

Atlas Laterality - Roll of the Atlas/C1 Vertebrae

C1 Roll Left  Descending Pattern

  • Head Tilt Left
  • Tight Right Neck Muscles
  • Right Right Rhomboides
  • Pelvic Tilt Left (High Right Pelvic Rim)
  • Long Right Arm
  • Tight Right Hamstrings (painful pes anseranus)
  • Tight Right Gastrocnemius and Soleus
  • Short Right Leg

C1 Roll Right Descending Pattern

  • Head Tilt Right
  • Tight Left Neck Muscles
  • Tight Left Rhomboides
  • Pelvic Tilt Right (High Left Pelvic Rim)
  • Long Left Arm
  • Tight Left Hamstrings (painful pes anseranus)
  • Tight Left Gastrocneumius and Soleus
  • Short Left Leg

Atlas Laterality is a frontal plane rotation (roll) of the C1 Vertebrae

(See Animation Below)

Left Head Tilt resulting from a Left Laterality
(Roll/Frontal Plane Rotation) of the Atlas.  

(2)  Pure Descending Postural Distortional Pattern seen in a C1 Roll left

Dental Implications:  

Distortions in the position of the maxilla (e.g., malocclusions) can result in a Laterality (Roll) of the Atlas (C1)

When the Maxilla is in a rolled position (deviated on the frontal plane):

  • The Atlas Rolls (Attilio)
  • The Axis distortion destabilizes the entire spine (increased scoliotic and kyphotic curves (Korbmacher et al)  Note: My current research suggests that frontal plane distortions in the Atlas (e.g. an Atlas Roll) only destabilizes the spine in the frontal plane (e.g., augmenting the scoliotic curves).
  • The distortions in the spinal curves destabilizes the pelvis in both the frontal (rolls) and transverse planes (yaws) (Seemann)  Note: My current research suggests that frontal plane distortions in the spinal cord only distort the pelvis in the frontal plane (e.g., pelvic tilt).
  • The tilt (unleveling) in the pelvis can result in medial knee pain (at the level of the pes anseranus) and lateral ankle pain (peroneal muscles)
  • If the Atlas Roll is severe enough, it can result in symptoms similar to those seen in degenerative neurological disorders (Thomas and Wood, 1992, Case History).

(1)  Pure Descending Postural Distortional Pattern seen in a C1 Roll right