Arm muscles: the anatomy and structure of the human hand

Arm muscles

Arm muscles – is one of the most useful parts of the body. And one of the most popular parts of muscles when building. But before you start to swing your hands, you need to learn about their structure, anatomy, and what muscles are working in certain movements and are responsible for it.

Our arms consist of two types of muscle, the upper arm, and the forearm. The upper arms are the muscle from your shoulder up to the elbow while the forearms extend from the elbow up to your wrist.

It is essential to always know what type of movement that your arm muscle can do. So you’d be weary and familiar when you do a certain exercise.

The four major movements are:

  1. This movement makes the two body parts closer or intact, perhaps your forearm and upper arm.
  2. It increases the space between two body parts. Straightening your elbow is a good example of this.
  3. It produces a movement where your body parts away from the center, it is such like lifting your arm out and away from your body.
  4. This refers to a movement where you move your arms towards the body’s midline.


So, in this article, we will tell you about the structure and anatomy of the hand muscles. To begin with, hands are made up of various muscles, it is big and we can see it with our naked eyes. Nonetheless, the muscles of the leg are hidden but no less important.

If we divide the arm visually into two parts, in the top, you can see a group of shoulder muscles, and at the bottom, a group of forearm muscles. Arm muscles are responsible mainly for extension and flexion. Let’s look at the anatomy of each muscle in your hands alone.

Digression: looking for the best exercise for the inner thigh workout – do squats plié!

Anatomy and structure of the bicep arm

This muscle has the thing they called  “short head” and “long head” thing that functions as a single muscle. Basically, the biceps are attached to our tendons which are considered to be strong connective tissues. When there is a contraction of biceps, it pulls up the forearms and rotates outwards.

Two muscles are lying below the biceps brachii. We call the two as coracobrachialis muscle, it is like the biceps itself fastened to the coracoid process of the scapula, and the brachialis muscle that joins to the ulna and beside the midshaft of the humerus. Moreover, the brachioradialis muscle is adjoining to the biceps and as well inserts on the radius bone.

There are types of fibers in the biceps muscle that are significant. They are called fast-twitch muscle fibers, more specifically type IIb fibers. These fibers are considered to be muscle fibers that could produce fast and strengthful contractions for a short period of time.

The bicep, one of the most famous arm muscles. The biceps are the most evident and visible muscle when someone does a handshake. So if someone finds out that you are shaking your hand, then immediately asks you to show this particular human muscle structure arm, you do such a thing by bending and flexing your entire arm. In this way, he will get amazed because your bicep will tend to be bigger.

Anatomy and structure of the arm triceps

The triceps, another well-known arm muscle. It is located at the other side of the arms, in frontal perspective, you can see the biceps and the triceps is at the back. It has three heads, starting in different places. Triceps are responsible for the extension of each joint both left and right. Furthermore, with the means of biceps, people possibly do such things like extension and retraction of their forearms.

We usually think that the tricep as a whole is just a mere bulk of muscle at the back of our biceps but, we don’t ever know that it consists of three different bundles – long head, lateral head, and medial head. Those three have their own distinct functions making it very important. Also, these three are classically known to be innervated by radial nerves.

Triceps can be worked out through compound elbow extension movements or isolation and can be contracted statically to remain the arm straightened in opposition to defiance.


The structure of the muscles of the forearm

We begin with the muscles of the forearm and let’s tackle it. These are muscles of four and try to consider each of them.

The first is brachialis, it is under the biceps that promotes bending of the elbow.

Secondly, the brachioradialis. It is located on the front of the forearm. Also flexes the elbow, and rotates the forearm.

Then, long flexor carpi radialis muscle is a name you can guess, it is actually the muscle that helps move our wrist, and or unbend.

Klyuk Vidno-shoulder muscles are fast carbs accumulating muscle. It was named because of its similarity to the bird’s beak. It causes the arm to move with the body when the elbow bends.

Digression: If you do not know what exercise to choose for shoulders, wiring dumbbells in hand is the best way to train the deltoids!

In general, it is all hand muscles. Now you know about the anatomy of the human hand muscles, and what they are responsible for. With this knowledge, it will be much easier for dbol gh to make the training program.


Knowledge of the location of the arm muscles in the upper limbs will allow beginners to understand what and how they train by performing certain exercises. For the symmetrical development of the hands, you should not apply all the exercises from the list in one workout. The list will be just a hint, with these exercises, old programs must be replaced by newer ones. Doing a day of hands, you should do the working of the antagonist’s muscles with the same amount of exercise. For example, take 3 exercises to the biceps, and the same amount to the triceps. Although human arm muscles are small and can recover quickly, you should not train them often – no more than 2 times a week.


Author: admin

18 thoughts on “Arm muscles: the anatomy and structure of the human hand

  1. Can you name the four different parts of your arm muscles?

  2. There are four parts of arm muscles. Three for anterior, biceps brachii, coracobrachialis and brachialis. And the triceps brachii for posterior compartments.

  3. Do you know where the forearm is located on the body?

  4. Forearms can be located between our wrist and elbow joint.

  5. Would you recommend the best food for biceps and triceps?

  6. It is recommended to eat eggs, salmon, chicken breasts, tuna, lean beef, turkey breast, yogurt, chickpeas, and beans.

  7. lalakoko11 says:

    What is the recommended protein intake amount daily?

  8. Per pound of your body weight is the basis. You must have 1.4g to 1.8g per pound. E.g. If you weigh 120 pounds and prefer 1.4g of proteins, therefore, daily you must take 168g (120 x 1.4=168).

  9. What are the muscles on the upper arm?

  10. How much time does it require to build arm muscle?

  11. So the 30 minutes workout enough to build muscle?

  12. The upper arm contains four muscles – three in the anterior compartment (biceps brachii, brachialis, coracobrachialis), and one in the posterior compartment (triceps brachii).

  13. beginners can expect to see noticeable muscle growth within eight weeks of starting a new training routine.

  14. Going through your entire day in the gym isn’t important to build muscle. Weight preparing for 20 to 30 minutes, 2 to 3 times each week is sufficient to get results.

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