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Table 1 The Beighton Hypermobility Scoring system is designed to quantify joint laxity and hypermobility. It uses a simple 9-point system, where the higher the score the higher the laxity. The threshold for joint laxity in a young adult ranges from 4 to 6. Any score above 6 indicates hypermobility, but is not necessarily true [25, 26]

From: Congenital absence of lingual frenum in a non-syndromic patient: a case report

Joint Finding Points
Left little (fifth) finger Passive dorsiflexion beyond 90° 1
Passive dorsiflexion ≤ 90° 0
Right little (fifth) finger Passive dorsiflexion beyond 90° 1
Passive dorsiflexion ≤ 90° 0
Left thumb Passive dorsiflexion to the flexor aspect of the forearm 1
Cannot passively dorsiflex thumb to flexor aspect of the forearm 0
Right thumb Passive dorsiflexion to the flexor aspect of the forearm 1
Cannot passively dorsiflex thumb to flexor aspect of the forearm 0
Left elbow Hyperextends beyond 10° 1
Extends ≤ 10° 0
Right elbow Hyperextends beyond 10° 1
Extends ≤ 10° 0
Left knee Hyperextends beyond 10° 1
Extends ≤ 10° 0
Right knee Hyperextends beyond 10° 1
Extends ≤ 10° 0
Forward flexion of trunk with knees fully extended Palms and hands can rest flat on the floor 1
Palms and hands cannot rest flat on the floor 0