Reading Time: 4 minutes

Tright here are a few groups of joint classifications, however in this post, I will emphasis on those most familiar: the synovial joints. Synovial joints are identified by the synovial fluid present in the joint capsule that helps to lubricate the joint. The stcapability of a joint counts on the form of the joint itself as well as its surrounding frameworks. This includes the bones that comprise the joint, cartilage, ligaments, tendons, and also muscles. Cartilage on the bony surencounters that consist of the joint assist to boost the surconfront location of the joint (thereby boosting the stability), and/or cushion the joint. Muscles, tendons, and also ligaments aid to produce support about the joint. The form of the bones assist to dictate which motions it will permit.

You are watching: Which of the following is not a factor that contributes to joint stability?

Types of Synovial Joints

Within the group of synovial joints, the form of the articular surfaces of the joint, and the activity enabled at each joint assist to even more break dvery own joint categories.


1. Ball and Socket Joints: These joints enable for the greatest selection of movement. The joint entails a ball fitting right into a concave surconfront. Because these joints allow for even more motion, they are at better risk for instcapability. Ball and socket joints allow for motion in many type of planes, and also circumduction.

The shoulder and hip are both round and socket joints.

2. Condyloid Joints: Allow for flexion, extension, and some lateral activity at the joint. There is likewise some circumduction that takes place. The circumduction is limited but, because the shape of the joint is oval compared to the even more mobile sphere and socket joints. Fingers need to be able to move in a circular activity, although it is small. Condyloid joints are likewise described as ellipsoidal joints.

The base of each finger is a condyloid joint.

3. Saddle Joints: These joints are made of 2 concave and also convex surfaces that intersect. Saddle joints allow for flexion, expansion, and lateral motion. Saddle joints may existing as a condyloid joint, yet if you attempt to move your thumb in a perfect circle, you will certainly alert its movement will certainly not be smooth like the circular motion feasible with a finger.

The base of the thumb is an example of a saddle joint.

4. Hinge Joints: Hinge joints allow for activity in one aircraft just. Think of a door hinge. It permits the door to open up and close, yet not move up or down.

Knees and elbows are some prevalent examples of hinge joints.

5. Pivot Joints: This form of joint enables for rotation. Unchoose many various other synovial joints, it does not allow for any type of flexion or expansion.

The initially 2 cervical bones (the atlas & axis) develop a pivot joint. The atlas sits on top of the axis and enables a “no” activity of the head (left & best rotation)


Improving stability

Training the muscles approximately a joint helps to boost its stcapacity. The stronger the muscles, the even more control they have actually over the movements of the joint. A muscle imbalance can also bring about joint laxity.

See more: Tunnels Under Walmart Confirmed, Tunnels Under Wal

Post injury, training will mainly involve both adaptability and strength training of a joint. The adaptability training is to assist reget or improve a joint’s variety of activity for day-to-day tasks. The toughness training is both to aid through useful motions alongside building and also maintaining joint stcapacity.

For instance, I dislocated my shoulder in the Fevery one of 2014. I percreated range of movement and also stamina exercises to reobtain my use. As I evolved, I was able to carry out exercises through a broader range of activity to continue enhancing my stcapacity. The exercises also affiliated many kind of directions of activity. Training my shoulder this way absolutely carried up the stcapability (and also is still helping to save it stable). Clearly on it will certainly constantly be at danger for some instcapability injuries, however training it safely helps me to avoid such instances!



In my last blog article, I explored hypermobility of joints. Overstretching a joint can decrease its overall stability, and also overtraining a joint without stretching deserve to decrease its variety of movement. Tright here is constantly a happy medium between stretching and training the muscles for your finest feature. As constantly, make certain you stretch what you strengthen and strengthen what you stretch!


Adrienne Lema BPE Student


1. Classification of Joints on the Basis of Structure and Function. Boundmuch less Biology. Boundless, (21 Jul. 2015). Retrieved 30 Jul. 2015 from

2. Joints of the Skeleton, , Retrieved from

Image References:

1. Joints, Gelenke Zeichnung, (2005) Retrieved from Lema, Adrienne (2014)3. Lema, Adrienne (2014)4. Lema, Adrienne (2014)

ball and also socketcondyloid jointhinge jointenhance joint stabilityjoint classificationjoint stabilitypivot jointsaddle jointsynovial joint