Respuesta :
During a muscle contraction, the insertion moves towards the origin but not the origin moving towards the insertion. The origin is where the muscle joins the stationary bone. The insertion is where it joins the moving bone. When a muscle contracts, the insertion moves towards the origin.
What is Kinetic Chain?
The Kinetic Chain is an engineering concept used to describe human movement. It is used in a wide variety of clinical condition including musculoskeletal, sports medicine, neuro rehabilitation, prosthetic and orthotics.
The concept of Kinetic Chain was introduced by Franz Reuleaux in 1875. According to him overlapping segments were connected via joints and this created a system where movement ay one joint produced or affected movement at another joint in the kinetic link.
Two types of Kinetic Chain are:
Open Chain:
It is a combination of successively arranged joints in which terminal segment can move freely. Thus the distal segment of the extremity is free to move in space, example- Waving a hand
Characteristics:
- Characterized by a rotary stress pattern at the joint.
- Occur in one primary axis
- The number of simultaneously moving segment is typically limited to one.
- These types of exercises allow for more isolated muscle activation because less muscle co-contraction is used to perform the movement.
Closed Chain:
It is when the distal segment meets considerable external resistance prohibiting free movement. It is a system where neither the proximal nor the distal segment can move.
Characteristics:
- Linear stress pattern produced at the tibiofemoral joint due to axial joint loading.
- Movement at multiple joints and multiple -joint axes at hip, knee, subtalar joints.
- Simultaneous movement occurs at both segment.
What are Insertion and Origin muscles?
The insertion and origin muscles are two different places where the bone is attached one at each end. Enthesis is the connective tissue between this attachment.
Insertion Muscles- The insertion muscles are connections to the bone via tendons. It is attached to the more movable bone.
Thus, this muscle is responsible for body movement. It is usually the distal end and has less mass.
Origin Muscles- Origin is the proximal site that stays more stable and relatively fixed during muscle contraction.
The head is a portion at the end of the origin muscle where it fixes to the bone. Some muscles can have more than one head.
Difference between two:
1. Insertion is more movable compared to Origin muscles as the former is attached to bone via tendons whereas the latter is less movable as it is attached via bone.
2. Insertion is a distal end attached to more movable bone whereas origin is proximal end attached to the less movable bone.
3. Insertion has less muscle mass whereas Origin has more muscle mass
4. Insertion moves with muscle contraction whereas Origin doesn't move during Muscle Contraction.
To learn more about Kinetic Chain here
https://brainly.com/question/27378159
#SPJ2
