10 Questions
Which nerves compose the brachial plexus?
Anterior branches of four inferior cervical nerves and the greater part of first thoracic nerve
Where does the brachial plexus pass through?
Space between the scalenus anterior and scalenus medius into the supraclavicular fossa
How many thick nerve trunks arise from the brachial plexus?
Three
What are the two parts usually distinguished in the brachial plexus?
Pars supraclavicularis and pars infraclavicularis
What do the short branches of the brachial plexus supply?
Cervical muscles partially, as well as the muscles of the shoulder girdle and the shoulder
Which muscles do the short branches of the brachial plexus supply?
Cervical muscles and shoulder girdle muscles except trapezius
Which nerves compose the brachial plexus?
Inferior cervical nerves and first thoracic nerve
Where does the brachial plexus pass through?
Space between scalenus anterior and scalenus medius
How many thick nerve trunks arise from the brachial plexus?
Three
What are the two parts usually distinguished in the brachial plexus?
Pars supraclavicularis and pars infraclavicularis
Study Notes
Brachial Plexus Composition
- The brachial plexus is composed of the roots of spinal nerves C5-C8 and T1.
Brachial Plexus Pathway
- The brachial plexus passes through the posterior triangle of the neck and the axillary region.
Brachial Plexus Structure
- Three thick nerve trunks arise from the brachial plexus: the superior trunk (C5-C6), the middle trunk (C7), and the inferior trunk (C8-T1).
- The brachial plexus is usually divided into two parts: the supraclavicular part (roots and trunks) and the infraclavicular part (divisions, cords, and branches).
Brachial Plexus Functions
- The short branches of the brachial plexus supply the shoulder joint and the surrounding muscles.
- The short branches of the brachial plexus supply the following muscles: subclavius, pectoralis minor, and serratus anterior.
Test your knowledge of the brachial plexus anatomy and function with this quiz. Identify the nerve branches and their origins, understand the pathway through the supraclavicular fossa, and more. Perfect for medical students and professionals studying neuroanatomy.
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