Joint Scavenger Hunt

By : Shreya Gazawada and Savitha Srinivasan

Hinge Joint

Explanation

The pictures above represent the hinge joint, because of their similarities. Th hinge joint moves in one direction and can't rotate completely. For example, the knee joint or the elbow joint. The first picture is an image of a CD case. This represents a hinge joint, because it can't rotate completely and only opens in one direction. The next picture is of an iPad stand. The stand also opens in one direction and can't rotate completely, because it isn't that flexible. Just like the hinge joint, it only rotates on one axis, Finally, the cardboard flap. It only rotates on the horizontal axis, can't rotate completely, and can't move in more than one direction, which can represent a hinge joint.

Gliding Joint

Explanation

The gliding joint is a joint which allows a born to glide past another one creating movement and flexibility. The following pictures represent a gliding joint due to their characteristics. For example, the phone case. The top of the phone case can glide to reveal the bottom portion. This is like a gliding joint, since when you push on the top part it allows it to glide past the rest of the phone case. Also, the desk is an example. The bottom part of the desk can glide forward or backward. It can be pulled on to move forward and pushed on to go back, this is possible because of the structures of the sides. Another example, would be the drawer of a dresser. The dresser has a slider on the side that lets it move 'glide' in one direction (front to back) allowing the drawer to come out and go back into the main dresser.


Ball and Socket Joint

Explanation

Ball and Socket :

Explanation : It's like a ball fitting in a socket, hence the name. The joint contains a vertical shaped bone that fits around the round edge that fits under the surface of a shell cover. With this sort of placement the ball and socket joint has a lot of movement and can rotate freely in all directions inside the socket.

For example, the wheels that are under a movable chair. The wheels that lie under represent the outer shell cover while the vertical rod that is connected to the wheel would represent the vertical bone. With that settled, the wheels may move any direction they are pushed. A wheelchair can also be used to represent a "ball and socket joint". By the wheels attaching to the rod that lets them move in any direction related to the joint that lies in the human body. The mirror in the picture can also be identified as a ball and socket joint. The spherical 3D object would represent a ball and the rode attaching that lies in the wood plank of the mirror(is not visible) is the long cord that would be the one that attaches to the ball of the ball and socket joint. This allows the mirror to move freely in directions it can be pushed at.


Pivot Joint

Explanation

A pivot joint is a joint that allows one bone to rotate within a ring. For example, the joint that lets you turn your head. The first picture is of a fan. This represents a pivot joint, because the place where the stand and fan meet rotates about 3/4 the way on either side but doesn't rotate 360 degrees. In this example, one structure moves while the other one stands still, like a pivot joint. The next example is a dell laptop. This dell laptop can fold back almost completely, but not all the way. It resembles a pivot joint since, only the screen can rotate, not the keyboard. Just like in a pivot joint, one bone rotates about the other. The final example is a spiral. This can rotate almost all the way in either direction. The spiral is blinded with rings so the book rotates within the rings similar to what happens in a pivot joint.