We highlight the complexity of the human spinal cord neuroanatomy and several sources of variability that may explain the observed patterns of activity. Instead, the activity for both stimuli had a broader than expected distribution, extending across the C5, C6, and C7 spinal cord segments. Contradictory to our hypotheses, the activity for both stimulation sites was spread across the dorsal and ventral hemicords and did not demonstrate a clear superior-inferior localization. The findings demonstrate lateralization of the activity with the left- and right-sided stimuli having more activation in the ipsilateral hemicord. Based on the central sites for processing of innocuous tactile sensory information, we hypothesized that the activity would be localized more to the ipsilateral dorsal spinal cord with the lateral shoulder stimulation activity being localized more superiorly than the dorsal third digit. C5 dermatome) and dorsal third digits of the hands (i.e., C7 dermatome) in healthy humans (n = 24, age = 36.0 ± 11.8 years). Here we used spinal cord functional MRI to map and quantitatively compare the spatial distribution of sensory spinal cord activity during tactile stimulation of the left and right lateral shoulders (i.e. Dermatomal maps, however, have limitations, and the spatial distribution of spinal cord sensory activity in humans remains to be quantitatively assessed. Dermatomal deficits can help isolate the level of spinal nerve root involvement in spinal conditions and guide clinicians in diagnosis and treatment. Vice Provost for Undergraduate Educationĭermatomal maps are a mainstay of clinical practice and provide information on the spatial distribution of the cutaneous innervation of spinal nerves.
Office of Vice President for Business Affairs and Chief Financial Officer.Office of VP for University Human Resources.Stanford Woods Institute for the Environment.Stanford Institute for Economic Policy Research (SIEPR).Institute for Stem Cell Biology and Regenerative Medicine.Institute for Human-Centered Artificial Intelligence (HAI).Institute for Computational and Mathematical Engineering (ICME).Freeman Spogli Institute for International Studies.School of Earth, Energy and Environmental Sciences.
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