A multi-panel medical figure presenting diagnostic imaging and quantitative data for Whiplash-Associated Disorder (WAD). Panels A-F show anatomical and functional MRI of the cervical spine: (A) Sagittal T2-weighted and (B) STIR sequences; (C) DTI-tractography highlighting spinal cord fibers; (D) Coronal T1-weighted view of the neck; (E) Dynamic T2-weighted sagittal imaging assessing cervical stability; and (F) Axial T1-weighted view of the neck musculature. These images demonstrate an absence of traumatic lesions, fractures, or disc herniation. Panels G and H are comparison charts displaying Diffusion Tensor Imaging (DTI) metrics from cervical levels C1 to C6. Graph G measures Fractional Anisotropy (FA), and Graph H measures the Apparent Diffusion Coefficient (ADC). In both, open circles represent the acute phase and filled triangles represent the chronic phase of WAD. The data indicates no significant change in spinal cord microstructural integrity over time. The figure serves as a clinical example of structural findings in WAD patients at different injury stages.

This diagnostic image consists of two side-by-side sagittal T1-weighted MRI scans of the cervical spine. The imaging demonstrates acute post-traumatic findings, specifically identifying prevertebral and intraspinal hemorrhage. Red arrows point to a prevertebral hematoma, visualized as a region of slight hyperintensity in the prevertebral soft tissues anterior to the C5-T1 vertebral bodies. Yellow arrows indicate an intraspinal epidural hematoma, which appears as a hyperintense signal within the spinal canal, posterior to the vertebral bodies, causing mass effect and moderate compression of the cervical spinal cord. The anatomical region spans the lower cervical and upper thoracic levels. These features are characteristic of acute whiplash or high-energy trauma, highlighting the risk of multi-compartment bleeding. This content is intended for intermediate to advanced medical education, focusing on neuroradiology and emergency trauma assessment of spinal cord compression and ligamentous injury.

This diagnostic image consists of two side-by-side axial T2-weighted MRI (T2WI) views of the cervical-thoracic spine. The left panel demonstrates a large intraspinal epidural hematoma, visualized as an area of heterogeneous hyperintensity within the spinal canal. A yellow arrow points to the hematoma, while a purple arrow indicates the resulting anterior compression of the spinal cord, which appears flattened and displaced. The right panel highlights the prevertebral region, where a red arrow identifies a prevertebral hematoma manifesting as hyperintense fluid collection anterior to the vertebral body. These findings illustrate significant soft tissue trauma, specifically secondary to whiplash or spinal injury, leading to cord compromise. The image serves as an educational tool for identifying acute post-traumatic spinal hematomas and assessing their spatial relationship with the spinal cord and vertebral column.

This diagnostic image demonstrates a comparative fat/water MRI study of the deep cervical extensor muscles (multifidus and semispinalis cervicis) across the C4 to C7 vertebral levels. On the left, a sagittal T2-weighted MRI of the cervical spine serves as a reference, with horizontal white lines and blue arrows indicating the specific axial slice locations. To the right, two columns of axial images illustrate the results of a 2-point Dixon sequence: the 'Fat' column highlights high-signal (bright) areas of muscle fat infiltration (MFI), while the 'Water' column displays corresponding water-signal images. Red outlines on the axial views delineate the manual segmentation of the dorsal muscle groups for quantitative analysis. This visual material is used in clinical research to assess muscle composition changes in patients following whiplash-associated disorders (WAD). The presentation emphasizes the anatomical distribution of intramuscular adipose tissue, which is a key biomarker for cervical spine pathology and functional recovery post-injury.

This diagnostic image consists of two sagittal T2-weighted magnetic resonance imaging (MRI) scans of the cervical spine, demonstrating a comparison between traumatic injury and degenerative disease. Panel A shows a control patient with cervical vertebrae fractures and dislocation at the C4 and C5 levels; however, the intervertebral discs at C4-5 and C5-6 maintain high T2 signal intensity, indicating healthy, non-degenerated nuclei pulposi. Black arrows point toward the experimental harvest sites. Panel B displays the cervical spondylosis group, characterized by multilevel disc herniation and significant signal loss (darkening) at the C4-5, C5-6, and C6-7 levels, which is diagnostic of advanced intervertebral disc degeneration (Thompson grades 3-5). A white arrow highlights a subtotal vertebrectomy site. The image illustrates the contrast between acute mechanical trauma (fracture/dislocation) with preserved disc integrity versus the progressive pathological changes of cervical spondylosis, including canal stenosis and decreased disc height.

This diagnostic image consists of two sagittal computed tomography (CT) scans of the human cervical spine, bone window, labeled (a) 'R' for the right side and (b) 'L' for the left side. The images demonstrate the cervical vertebrae from the skull base down to the upper thoracic region. The primary pathology is a bilateral facet joint dislocation at the C5-C6 level, indicated by white horizontal arrows in both panels. This finding represents a significant post-traumatic cervical spine injury characterized by the displacement of the inferior articular processes of C5 anterior to the superior articular processes of C6, resulting in vertebral malalignment and disruption of the normal posterior spinal curvature. The vertebral bodies at other levels maintain a generally rectangular shape with preserved intervertebral disc spaces. This visual serves as a critical educational example of high-grade spinal instability and segmental dislocation following cervical trauma, highlighting the importance of sagittal reconstruction in identifying facet joint 'jump' or lock.

**Imaging Modality:** Computed Tomography (CT), sagittal reformatted view. **Anatomical Region:** Cervical spine extending from the craniocervical junction to the upper thoracic levels. **Observed Pathology:** Traumatic cervical spine injury characterized by a high-grade anterolisthesis of C5 on C6. There is a complete disruption of the normal spinolaminar line and posterior vertebral line, consistent with a bilateral facet dislocation or severe fracture-subluxation. **Characteristic Visual Features:** - **Skeletal Alignment:** Significant anterior displacement of the C5 vertebral body relative to C6, resulting in "off-set" alignment. - **Canal Dimensions:** Severe narrowing and compromise of the central spinal canal diameter at the C5-C6 level due to the osseous translation. - **Associated Findings:** Disruption of the anterior and posterior longitudinal ligament planes; prevertebral soft tissue swelling is suggested anterior to the mid-cervical vertebrae. The remaining cervical segments (C1-C4 and C7) appear relatively aligned. **Key Diagnostic Features:** Traumatic spondylolisthesis with acute spinal canal stenosis, secondary to a distractive-flexion injury mechanism. This represents a highly unstable cervical spine fracture-dislocation pattern.