diff --git a/source/index.rst b/source/index.rst
index 014141c..0eb33b1 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -21,7 +21,7 @@ Open Ephys Commutators
                         <p class="card-text">
                             Open-ephys commutators provide nearly <b>torque-free</b>
                             tether management for freely moving recordings.
-                            Internal-measurement units (IMUs) or video-based
+                            Inertial-measurement units (IMUs) or video-based
                             pose-estimation methods (e.g. <a
                             href="https://github.com/DeepLabCut/DeepLabCut">
                             DeepLabCut </a> or <a