Multiple Choice
Where do the cervical spinal nerves originate in the central nervous system?
179
views
13. The Peripheral Nervous System
Introduction to the Peripheral Nervous System
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following nerves does not arise from the brachial plexus?
A
Radial nerve
B
Median nerve
C
Ulnar nerve
D
Phrenic nerve
Verified step by step guidance1
Understand the brachial plexus: The brachial plexus is a network of nerves that originate from the spinal cord in the neck and travel down the arm. It is responsible for the motor and sensory innervation of the upper limb.
Identify the nerves that arise from the brachial plexus: The major nerves that arise from the brachial plexus include the radial nerve, median nerve, and ulnar nerve. These nerves are involved in the movement and sensation of the arm and hand.
Recognize the function and origin of the phrenic nerve: The phrenic nerve is primarily responsible for innervating the diaphragm, which is crucial for breathing. It originates from the cervical plexus, specifically from the C3-C5 spinal nerves, not the brachial plexus.
Compare the origins: While the radial, median, and ulnar nerves are all derived from the brachial plexus, the phrenic nerve is distinct because it arises from the cervical plexus.
Conclude the distinction: Based on the origin and function, the phrenic nerve does not arise from the brachial plexus, unlike the other nerves listed.
3:33mWatch next
Master Peripheral Nervous System with a bite sized video explanation from Bruce Bryan
Start learningRelated Videos
Related Practice
Introduction to the Peripheral Nervous System practice set
Problem sets built by lead tutorsExpert video explanations