Toward Understanding Normal Craniocervical Rotation Occurring During the Rotation Stress Test for the Alar Ligaments

Peter Grant Osmotherly; Darren Rivett; Lindsay J. Rowe

doi:10.2522/ptj.20120266

Figures

Figure 1.

Stabilization of the axis (view from superior aspect). The therapist's thumb and index finger provide broad contact around the neural arch of the axis. The hand is “cupped,” and the thumb is adducted.

Figure 2.

Neutral position: angle formed by the intersection of line 1 indicating the superimposed position of the line joining the transverse foramena and line 2 between the internal carotid arteries entering the foramena lacerum (a).

Figure 3.

Rotation stress test position: angle formed (θ) by the intersection of line 1 indicating the superimposed position of the lines joining the transverse foramena and line 2 between the internal carotid arteries entering the foramena lacerum (a).

Tables

Table 1.

Angles (in Degrees) Formed by the Intersection of the Lines Joining the Transverse Foramena and the Foramena Lacerum^{^a}

↵^a Angles formed by the intersection of the lines joining the transverse foramena (line 1) and foramena lacerum (line 2), as illustrated in Figures 1 and 2, indicate rotation of the occiput with respect to the axis in neutral and rotation stress test positions.

Table 2.

Estimates of Reliability for the Angular Measurements in Neutral and Rotation Stress Test Positions^{^a}

↵^a ICC=intraclass correlation coefficient, 95% CI=95% confidence interval for ICC, SEM=standard error of measurement.

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Toward Understanding Normal Craniocervical Rotation Occurring During the Rotation Stress Test for the Alar Ligaments

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