What is the Difference between origins and Insertions? [HOJI]

Описание: What is the difference between origins and insertions? [HOJI]

If you are struggling to remember the difference between origins and insertions of every muscle in the body ready for your exam, this quick strategy will certainly help.

I recently filmed this as part of a free webinar and it had a great response, making people feel a lot calmer about the muscles section of their Level 3 anatomy and physiology exam.

There are three facts you need to know in order to understand origins and insertions
1. What are origins and insertions?
They are attachment points where the muscle meets the bone via a tendon. Every Skeletal muscle must have at least 2 attachment points. One end there is an origin, the other end there is an insertion

2. Closest to the heart
Generally speaking, the attachment point closes to the heart is the origin, and the one furthest from the heart is the insertion.

To help remember this we use the HOJI formula… Heart- Origin- Joint -Insertion.

This works well for periphery muscles, like the biceps, However, there are some exceptions… for example the rectus abdominis.

The origin is at he pubis and the insertion is the xiphoid process and costal cartilages… so its kinda upside down.

3. The fixed point
A more universal term is to consider that the origin is the fixed point, it stays still. And the insertion is at the end that moves a lot.

Let’s go back to the rectus abdominis, if you do a sit up, your pubis stays still, and your ribs move towards it.

Use this simple system to help you remember the difference between and origin and insertion on peripheral muscles:.

HOJI

Heart
Origin
Joint
Insertion

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