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that come later in the sequence from occurring simultaneously, as the grooming sequence consists of mutually exclusive behaviors. This hierarchy does not prevent Drosophila from returning to grooming behaviors that have already been accessed in the grooming sequence. The order of grooming behaviors in the suppression hierarchy is thought to be related to the priority of cleaning a specific body part. For example, the eyes and antennae are likely executed early on in the grooming sequence to prevent debris from interfering with the function of

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