The axillary nerve in the shoulder region is susceptible to damage For example

The axillary nerve in the shoulder region is

This preview shows page 4 - 6 out of 6 pages.

The axillary nerve in the shoulder region is susceptible to damage. For example, a person using crutches should be taught to bear the weight of the body on the hands and not on the armpit, or axillary region. The weight of the body can damage the axillary nerve, causing crutch palsy The radial and ulnar nerves, which serve the forearm, wrist, and hand, also emerge from the brachial plexus. Damage to the radial nerve can cause a wristdrop, and injury to the ulnar nerve causes the hand to appear clawlike; the person is unable to spread the fingers apart. Lumbosacral plexus (T12, L1 to L5, S1 to S4) The lumbosacral plexus gives rise to nerves that supply the muscles and skin of the lower abdominal wall, external genitalia, buttocks, and lower extremities. The sciatic nerve, the longest nerve in the body, arises from this plexus. The sciatic nerve supplies musculature of the thigh, leg, and foot. The sciatic nerve can become inflamed and cause intense pain in the buttock and posterior thigh region. A common cause of sciatica is a ruptured or herniated vertebral disc What a Dermatome Is A dermatome is a sensory thing. Each dorsal root of a spinal nerve innervates a particular area of the skin; this distribution of nerves is called a dermatome Each dermatome is named for the particular nerve that serves it. - For example, the C4 dermatome is innervated by the C4 spinal nerve. Dermatomes are useful clinically; - For example, if the skin of the shoulder region is stimulated with the tip of a pin and the
Image of page 4

Subscribe to view the full document.

person cannot feel it, the clinician has reason to believe that the C4 nerve is impaired. Functional Classification of the Peripheral Nervous System The functional classification explains where the nerves go and what they do. The functional classification of the peripheral nervous system includes the following: The somatic afferent nerves , which bring sensory information from the different parts of the body, particularly the skin and muscles, to the CNS The somatic efferent nerves , which bring motor information from the CNS to the skeletal muscles throughout the body The autonomic nervous system (ANS) is composed of nerves that supply the organs (viscera), smooth muscle, and glands.
Image of page 5
.
Image of page 6
  • Fall '19
  • Spinal nerve, Brachial plexus

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes