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Amendment: predominant elbow position. The rat is assessed for the most common position (more than 50% of the time) assumed by the elbow during eating. Extended is when the elbow is held straight with an angle of more than 160°. Flexed – The elbow is flexed with an angle of less than 160°. (Revisions of the IBB scale from the JoVE 2010 version are highlighted in italics.)
