Anatomical Variations of the Musculocutaneous and Median Nerves: A Case Report
Related Experiment Video
Updated: Jan 22, 2026

Functional and Physiological Methods of Evaluating Median Nerve Regeneration in the Rat
Published on: April 18, 2020
Marzieh Darvishi1, Ardeshir Moayeri1
1Department of Anatomy, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran.
Abstract:
The musculocutaneous nerve is a large terminal branch of the lateral cord of the brachial plexus. It passes under the pectoralis minor and penetrates the coracobrachialis muscle, descending between the biceps brachii and brachialis muscles in the arm. After dissection in upper extremities in a 28-year-old male cadaver, the median and musculocutaneous nerve were found to have variations on the right side where the musculocutaneous nerve formed communications with the median nerve. The median nerve innervated muscles of the front of the arm in this cadaver. In addition, the musculocutaneous nerve did not pierce the coracobrachialis muscle on the right side. Knowledge of these variations is extremely important when planning a surgery in the region of axilla.
Related Concept Videos
Median
Sign Test for Median of Single Population
What is Variation?
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
Variation
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
Variation of Atmospheric Pressure
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...

