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PLAY (bone and shape of) proximal segment OA JOINT. Kaltenborn's convex-concave rule is a familiar concept in joint treatment techniques and arthrokinematics. Click to read more on it.Besides, is the shoulder joint concave or convex? The “convex on concave” rule. I have a silly way to remember which side is the concave part of the curve by thinking of an actual cave made out of rock. Concave-Convex Rule: concave joint surfaces slide in the same direction as the bone movement. x�s (��}�QFK���̔\�ξ����>��QC�i/\s�$q�����G�������/� Abnormal roll-gliding The direction of limitation for joint gliding may be determined either directly (using glide testing) or indirectly using Kaltenborn Concave-convex rule. Volar glide. <>>>/BBox[0 0 582 762]/Length 135>>stream endobj (��}�QFK���̔\�ξ����>��QC�i/\s�$q�����G�������/� The convex–concave rule specifically states, “When the concave surface is stationary and the convex surface is moving, the gliding movement in the joint occurs in a direction opposite to the bone movement.” 4 Conversely, if the convex surface is fixed while the concave surface is mobile, the gliding motion occurs in the same direction as the bone movement. x�s Epub 2012 Jan 31. the joint(s) that the muscle crosses the axis/axes of each of those joints the muscle's line of application (LOA) local to each of the axes. Based on the concave - convex rule, which joint mobilization would help increase mobility of the humeroradial joint? It is CONVEX (domed), when the humerus moves in abduction, the surface of the humeral head will slide in the OPPOSITE direction to the movement of the humerus. These convex/concave relationships govern the rules for arthrokinematics. Glenoid- Concave (glenoid fossa) (bone and shape of) distal segment SHOULDER. endstream (��}�QFK���̔\�ξ����>��QC�i/\s�$q�����G�������/� Adobe InDesign CS4 (6.0.6) Most scoli spines have multiple curves and therefore have multiple concave and convex parts of the spine. femur rolling and gliding upon a fixed tibia during a squat or deadlift) 2. %PDF-1.6
Additional information from journals helps students understand the motion movements of shoulders and how they contribute to the motion of the rest of the body. Humerus- Convex … When a concave surface (i.e Tibia; talocrural joint) is moving on a stable convex surface (i.e Talus) sliding occurs in the same direction of the bony level. The Calcaneocuboid Joint however, has a saddle-shaped joint surface. The femur rolls posteriorly and slides anteriorly on the tibia. It gets its name from the shape as it has a concave surface in one direction and convex in another, like a saddle. You can watch a video in the top right corner in which we cover the concept in more detail. 6 0 obj The roll and glide/slide occur in opposite directions, according to the “convex on concave” rule. Arthrokinematicsrefers to the movement of joint surfaces. �E%���)�� Tricky!! This project also describes the functionalities in relation to the upper extremity of the concave and convex of the shoulder. This is apparently in direct conflict with the traditional “opposite” roll-and-slide pat-tern described for GH joint abduction. The “flaw” in this convex-concave rule, as it was explained to me, was exposed by a number of studies that measured Concave = hollowed or rounded inward; Convex = curved or rounded outward; If the moving joint surface is CONVEX, sliding is in the OPPOSITE direction of the angular movement of the bone. ��E%� x��� During a squat, the femur moves on a stable tibia. tion of the convex-concave rules is the arthrokinematics of abduction of the glenohumeral (GH) joint: the convex humeral head rolls superior relative to the glenoid fossa as a point on its articu-lar surface simultaneously slides inferior. P��h�0!�C}nB.��#��>*`�>� �� ��ȳ� ��s. endstream • Relationship of articulating surfaces associated with sliding/gliding • One joint surface is MOBILE & one is STABLE • Concave-convex rule: concave joint surfaces slide in the SAME direction as the bone movement (convex is STABLE) • If concave joint is moving on stationary convex surface – glide occurs in same direction as roll Convex-concave rule: convex joint … J Orthop Sports Phys Ther. Joint Mobilization Application All joint mobilizations follow the convex-concave rule Patient should be relaxed Explain purpose of treatment & sensations to expect to patient Evaluate BEFORE & AFTER treatment Stop the treatment if it is too painful for the patient Use proper body mechanics Use gravity to assist the mobilization technique if possible Begin & end treatments … The study of the upper extremity begins with the shoulder complex, a set of four articulations involving the ... the axis of rotation for a given motion intersects the convex member of the joint.) h�bbd```b``f�� �q?�d)�LQ`YW0y,�f��3��I`�B0;l�M�� endobj endstream
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The angular movement of bones in the human body occurs as a result of a combination of rolls, spins, and slides. When the concave surface is fixed and the convex surface moves on it, the convex surface rolls and glides in opposite directions. J Orthop Sports Phys Ther. x�ͱ� �ᝧ8��� Study These Flashcards. The data are contrasted with Kaltenborn's convex-concave rule explaining intra-articular kinematics of the glenohumeral joint as a ball-and-socket joint. 90° to 120° of shoulder abduction. x�+� � | The direction in which sliding occurs depends on whether the moving surface is concave or convex. Jan 22, 2015 - This Pin was discovered by kali coleman. <>>>/BBox[0 0 582 762]/Length 103>>stream endstream 15 <>>>/BBox[0 0 582 762]/Length 139>>stream The direction in which sliding occurs depends on whether the moving surface is concave or convex. Joint surfaces vary, however, from flat to slightly convex or concave (see Figure 5-16, B). <>>>/BBox[0 0 582 762]/Length 139>>stream "f�N���&)�����Og�L�����J�G-C�"%�U��⣇6,��L�V%���%��H�)P���p$pX�T������ t������:�$�FH���{�6R�M�Q��Ʒ�I�-���I[��ks���х�����]�AW�`J>�H����X�I�]�!ʝQ̡Wd[kF����$O5��
�lS���X�,��&��b�%�w����Q�y�R����M�DP"Z�r!d!�X�6.�R��Y���7Pn�1�-K���̺9���|}�>Byj�����F-��+���5�[��K�e�,`�~�z�R�痏5��S�D����������0��1L�цe W With the shoulder moving in the anatomical planes from 90 degrees abduction and 90 degrees external rotation into the apprehension test pose, the centre of the humeral head posteriorly translated on the glenoid and rotated about a finite helical axis, which was positioned at the joint contact. The therapist applies passive translatoric gliding movements in all possible directions and determines in which directions joint gliding is restricted. The effect of anterior versus posterior glide joint mobilization on external rotation range of motion in patients with shoulder adhesive capsulitis. <>>>/BBox[0 0 582 762]/Length 139>>stream Convex-Concave Rule
Fixed convex surface, moving concave surface
Glide occurs in same direction
Example: tibiofemoral (knee) joint
Fixed convex femoral condyles, moving concave tibialplateau
As the knee extends the tibia glides anteriorly
Mobilize tibia in anterior direction to increase extension ROM; posterior direction to increase flexion ROM
6. �i It gets its name from the shape as it has a concave surface in one direction and convex in another, like a saddle. Joint Mobilization Therapists must understand appropriate application of the convex-concave rule to effectively perform joint mobilization techniques. j %���� x�ͱ� �ᝧ8��� It is important to understand that the sternoclavicular joint is a saddle joint. The Shoulder Joint. A spinis a rotary movement, one body spinning on another. The convex-concave rules of arthrokinematics: flawed or perhaps just misinterpreted? endobj When a concave joint surface is moving, the roll and the glide occur in the same direction. endobj x�ͱ� �ᝧ8��� x��� endobj Concave-Convex Rule:Distal concave segment (base of P1) moves on proximal convex segment (MC head) Roll and Slide are in same direction Posterior glides to increase extension Anterior glides to increase flexion Small Joints of the Hand: MCP, PIP, and DIP: distraction and glides (A/P or P/A) 20 0 obj Adobe PDF Library 9.0; modified using iText 4.2.0 by 1T3XT A rollis a rotary movement, one bone rolling on another. A maximum of 15 to 30 degrees of motion have been reported in each direction. The author concludes his evidence against the convex-concave rule in the glenohumeral joint with a systematic review conducted by Brandt, et al (2007). The convex–concave rule is considered an important theory during treatment decision-making (Kirby et al., 2007). endstream Rules of concavity and convexity Movements at joint surfaces (arthrokinematics) follow the rules of concavity and convexity. As your palm rolls around the ball, it also glides in the same direction. <>stream First, grab a ball or a balled up piece of paper. endstream x�S�*�*T0T0 BC#sJ�UЏ�4Vp�W�!i�O�"� ��' Kaltenborn's convex-concave rule is a familiar concept in joint treatment techniques and arthrokinematics. <>>>/BBox[0 0 582 762]/Length 103>>stream endobj 1 0 obj <>stream - Posterior: Convex posterior calcaneus on concave posterior talus. �i 2012 Feb;42 (2):53-5. doi: 10.2519/jospt.2012.0103. The femur is a convex surface and the tibia is a concave surface. The convex-concave rule is the basis for determining the direction of the mobilizing force when joint mobilization gliding techniques are used to increase a certain joint motion. The Convex surface is stable. ^��Ey�9 Occiput- Convex (occipital condyles) (bone and shape of) proximal segment SHOULDER. In reference to the arthokinematics of abduction of the GH, “the convex humeral head rolls superior relative to the glenoid fossa as a point on its articular surface … <>>>/BBox[0 0 582 762]/Length 103>>stream � ��>E�lN��]���v����b���E��S ����A�; ��F�G��]� /�)���)ӊZ�\��")�� Let’s visualize the “convex on concave” rule of joint arthrokinematics. 3. My cupped palm creates a concave surface in which the convex ball can fit - just like a joint.
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