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Arm Muscles

Sidney edited this page Jul 27, 2022 · 30 revisions

Table of Content

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Upper Arm

Forearm

FULL ARM ^

Arm Muscles

UPPER ARM

Deltoid ^

  • Deltoid arches to the front, the sharp tip going backwards
  • The Deltoid isn't round but has a bump in the middle
MUSCLE PART ORIGIN INSERTION
Deltoid Anterior Head
Deltoid Medial Head
Deltoid Posterior Head
Example

Biceps Brachii ^

The Biceps consists of two heads that unite at the bottom

MUSCLE PART ORIGIN INSERTION INFO
Biceps Short Head (BB) Scapula coracoid process Radius tuberosity More towards the center
Biceps Long Head (BB) Socket of the Scapula Radius tuberosity

Brachialis ^

MUSCLE PART ORIGIN INSERTION INFO
Brachialis

Triceps Brachii ^

The Triceps consists of three heads that unite at the bottom into the Triceps tendon

MUSCLE PART ORIGIN INSERTION INFO
Triceps Long Head (T) Scapula Olecranon (Elbow)
Triceps Lateral Head (T) Humerus Olecranon (Elbow)
Triceps Medial Head (T) Humerus Olecranon (Elbow)
Triceps Tendon (T) Middle of Long/Lateral Tricpes head Olecranon (Elbow)

Coracobrachialis ^

MUSCLE PART ORIGIN INSERTION INFO
Coracobrachialis
Example

FOREARM

The forarm muscles are split into two groups the Flexors and Extensor. These two groups are visibly distinct, the Extensor group being the bigger one. The front border is below the Biceps/ Brachialis and the back border is below the Triceps, following the Ulna. The Extensors are farther from the midline where as the Flexors are closer to the midline.

Flexor and Extensor borders

Forearm Flexors ^

MUSCLE ORIGIN INSERTION INFO
Flexor Carpi Ulnaris (FCU) Between Triceps and Biceps Bottom of hand far side from thumb
Flexor Digitorum Superficialis (FDS) Phalangas, bottom side of all fingers except thumb Barely visible
Palmaris Longus (PL) Between Triceps and Biceps Hand Plam Barely visible
Flexor Carpi Radialis (FCR) Between Triceps and Biceps Bottom of hand close side to thumb
- - - -
Pronator Teres (PT) Between Triceps and Biceps Middle of Brachioradialis Stays beside the Biceps

Forearm Extensors ^

MUSCLE ORIGIN INSERTION INFO
Brachioradialis (Brr) Between Brachialis and Triceps Inner side of hand Brachialis side, bigger one
Extensor Carpi Radialis Longus (ECRL) Between Brachialis and Triceps Inner side of hand Triceps side, smaller one
- - - -
Extensor Carpi Radialis Brevis (ECRB) Between Extensor Carpi Radialis Longus and Triceps Inner side of hand Barely visible, Smaller one
Abductor Pollicis Longus & Extensor Pollicis Brevis (Anatomical Snuffbox) Middle of Extensor Digitorum Inner sie of hand Barely visible
- - - -
Extensor Digitorum (ED) Between Extensor Carpi Radialis Longus and Triceps Top of hand Bigger one, goes to the top tips of all fingers except thumb
- - - -
Extensor Digitorum Minimi (EDM) & Extensor Carpi Ulnaris (ECU) Between Extensor Carpi Radialis Longus and Triceps Top of hand far side from thumb Should be done as one
- - - -
Anconeus (A) Below Triceps

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