Biceps brachii muscle / biceps muscle

Synonyms in a broader sense

  • Biceps muscle
  • Biceps tendon
  • Biceps tendon rupture / tear
  • SLAP lesion.


Of the Biceps muscle (Muscle biceps brachii) called biceps for short belongs to the upper arm flexor muscles on the front of the upper arm. It is a two-jointed muscle that is connected to the Shoulder joint and the Elbow joint pulls.

The biceps muscle / biceps has two sinewy origins:

  • The long biceps tendon has its origin at the upper edge of the shoulder socket (glenoid). This origin is also known as the biceps tendon anchor. From its origin it runs through that Shoulder joint to the humeral head, where it continues in a bony groove (sulcus bicipitalis) towards the muscle belly. On the front of the shoulder, on the head of the humerus, the long biceps tendon can be easily felt in its groove.
  • The short biceps tendon of the biceps muscle / biceps has its origin in a continuation of the shoulder blade, the coracoid. The tendon runs diagonally downwards to the common muscle belly on the front of the upper arm.

The biceps muscle / biceps make up the majority of the external structure of the front upper arm.

It runs with a tendon Biceps muscle / biceps out. The tendon attaches to a stable roughness of the spoke bone (radius / Radial tuberosity). The tendon is very thick and stable. A planar side tendon shines into the muscular forearm covering (fascia).

Read more on the subject at: Upper arm muscles.

Illustration of the biceps brachii muscle

Illustration of the biceps brachii muscle: right upper arm seen from the front (A) and from the side (B)

Biceps brachii muscle
Biceps (two-headed upper arm muscle)

  1. Two-headed upper arm muscle
    (Biceps), long head -
    Biceps brachii muscle,
    Caput longum
  2. Two-headed upper arm muscle
    (Biceps), short head -
    Biceps brachii muscle,
    Caput breve
  3. Spoke shaft - Corpus radii
  4. Ellschaft - Corpus ulnae
  5. Three-headed upper arm muscle
    (Triceps) -
    Triceps brachii muscle
  6. Upper arm shaft -
    Corpus humeri
  7. Humerus head -
    Caput humeri
  8. Shoulder blade - Scapula
  9. Collarbone - Clavicle

You can find an overview of all Dr-Gumpert images at: medical illustrations

Figure right arm: A - muscles of the flexor side (palmar side) and B - muscles of the extensor side (dorsal side)

Arm muscles

  1. Two-headed upper arm muscle
    (Biceps) short head -
    M. biceps brachii, caput breve
  2. Two-headed upper arm muscle
    (Biceps) long head -
    M. biceps brachii, caput longum
  3. Upper arm muscle (arm flexor) -
    Brachialis muscle
  4. Three-headed upper arm muscle
    (Triceps) side head -
    M. triceps brachii, caput laterale
  5. Three-headed upper arm muscle
    (Triceps) long head -
    M. triceps brachii, Caput longum
  6. Three-headed upper arm muscle
    (Triceps) inner head -
    Triceps brachii muscle,
    Caput mediale
  7. Knobby Muscle - Muscle anconeus
  8. Elbow - Olecranon
  9. Upper arm spoke muscle -
    Brachioradialis muscle
  10. Long spoke-side hand straightener -
    Muscle extensor carpi radialis longus
  11. Spoke-sided hand flexor -
    Muscle flexor carpi radialis
  12. Superficial finger flexor -
    Muscle flexor digitorum superficialis
  13. Long palm tendon tensioner -
    Palmaris longus muscle
  14. Extensor tendon strap -
    Retinaculum musculorum extensorum
  15. Short spoke-side hand straightener -
    Muscle extensor carpi radialis brevis
  16. Elbow-sided hand flexor -
    Muscle flexor carpi ulnaris
  17. Finger extensor -
    Muscle extensor digitorum
  18. Trapezius -
    Trapezius muscle
  19. Deltoid -
    Deltoid muscle
  20. Pectoralis major -
    Pectoralis major muscle

You can find an overview of all Dr-Gumpert images at: medical illustrations


The biceps muscle / biceps has functions for moving the shoulder and shoulder muscles Elbow joint.

With its two origins, the biceps muscle / biceps acts as a lateral lifter (long biceps tendon = abductor), spreader (short biceps tendon = adductor), inner turner and forelevator (both) of the upper arm.

In the area of ​​the elbow joint, the biceps muscle / biceps functions as the strongest forearm flexor and inner turner of the forearm (supinator = turn palm towards the ceiling).

Through targeted examination techniques, the biceps muscle / biceps can be tensed to such an extent that characteristic pain occurs in the event of an injury.


Biceps tendon tear

The long biceps tendon is particularly prone to injuries to the biceps muscle / biceps. Chronic damage to the shoulder joint and instability in the upper arm groove can lead to inflammation (Tendovaginitis bicipitis) up to the complete Biceps tendon tear (biceps tendon rupture) come. Even the layperson recognizes this impressively Torn long biceps tendon on the muscle belly that had slipped down at the level of the lower upper arm due to the missing upper suspension.

A Torn short biceps tendon is very rare. Rarely, albeit occasionally, the strong biceps tendon attachment at the level of the elbow joint tears. While a tear in the long biceps tendon does not necessarily have to be operated on and is functionally well tolerated, a tear in the attachment of the biceps tendon is associated with a significant loss of function, which is why surgical intervention is necessary.

SLAP - lesion

Painful injuries to the biceps tendon anchor are difficult to diagnose (SLAP - lesion) difficult to grasp on physical exam and even in one Magnetic spin scan (MRI) of the shoulder are often overlooked.

You can also read more on this topic at: SLAP - lesion

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