# Brachialis (AGoodName)

<details id="bkmrk-this-line-will-be-vi"><summary>Preview:</summary>

The brachialis is one of the most overlooked muscles of the arm, just because its mostly covered by the bicep. The brachialis has one of the most important jobs, it flexes the arm!

</details>**Synonyms: Brachialis muscle; Humerus flexors; Musculus brachialis**

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### **Summary**

<span style="white-space: pre-wrap;">The </span>**Brachialis**<span style="white-space: pre-wrap;"> is like the </span>**middle sibling of the arm**<span style="white-space: pre-wrap;"> its covered up and forgotten. The brachialis is located below the </span>[bicep](https://www.anatomyarchive.org/search?term=Bicep)<span style="white-space: pre-wrap;">. One of its main functions is </span>**flexing the elbow**. For example when ever you itch your neck that's your Brachialis at work!

[![unnamed.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/vFLunnamed.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/vFLunnamed.jpg)

#### **Origin**

<span style="white-space: pre-wrap;">The brachialis </span>**originates**<span style="white-space: pre-wrap;"> from the </span>**anterior surface of the humerus**<span style="white-space: pre-wrap;"> or in other words just above the half way point of the humerus.</span>

#### **Insertion**

The brachialis **inserts**<span style="white-space: pre-wrap;"> on the </span>**tuberosity of the ulna**. A way to remember the brachialis starts a little more above the half way point of the humerus.

[![unnamed.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/unnamed.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/unnamed.jpg)

#### **Functions**

<span style="white-space: pre-wrap;">Its main purpose is </span>**flexing the elbow when your arm is in a pronated**<span style="white-space: pre-wrap;"> position.</span>

**Pronated arm: Inward rotation of the arm -&gt; the thumb points inwards, and the back of the hand faces forward**

#### **How to draw the muscle**

<span style="white-space: pre-wrap;">The </span>[bicep](https://www.anatomyarchive.org/search?term=Bicep)<span style="white-space: pre-wrap;"> </span>**covers the brachialis** so you can only see it from the side.

[![unnamed.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/mN4unnamed.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/mN4unnamed.jpg)

### **Advanced**

<details id="bkmrk-everything-beyond-th"><summary>Everything beyond the basics</summary>

<span style="white-space: pre-wrap;">Something to note, the brachialis works regardless if the arm is supinated or pronated, making it a super flexor. Because the </span>[bicep](https://www.anatomyarchive.org/search?term=Bicep)<span style="white-space: pre-wrap;"> is the star, when ever the arm is pronated the </span>[bicep](https://www.anatomyarchive.org/search?term=Bicep)<span style="white-space: pre-wrap;"> will force the brachialis to do most of flexing.</span>

</details>#### **Reference Pictures (for study only)**

<details id="bkmrk-name-the-source-%28web"><summary>From Herculesbodybulding.com; Pinterest</summary>

Herculesbodybulding.com; Pinterest[![Arnold-Arms-Workout-1024x682.webp](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/arnold-arms-workout-1024x682.webp)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/arnold-arms-workout-1024x682.webp)<span style="white-space: pre-wrap;"></span>

[![comment-avoir-veine-biceps-bras.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/comment-avoir-veine-biceps-bras.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/comment-avoir-veine-biceps-bras.jpg)

[![Top Exercises Big Arms.png](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/top-exercises-big-arms.png)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/top-exercises-big-arms.png)

[![1000_F_70043598_cRPLBVK83lZb0gk1bHJlr02luzGA3mqW.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/1000-f-70043598-crplbvk83lzb0gk1bhjlr02luzga3mqw.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-10/scaled-1680-/1000-f-70043598-crplbvk83lzb0gk1bhjlr02luzga3mqw.jpg)

[![fc60e7eeffb12dde083e144c8dd7372b.jpg](https://www.anatomyarchive.org/uploads/images/gallery/2025-09/scaled-1680-/fc60e7eeffb12dde083e144c8dd7372b.jpg)](https://www.anatomyarchive.org/uploads/images/gallery/2025-09/scaled-1680-/fc60e7eeffb12dde083e144c8dd7372b.jpg)

</details>