Skip to main content
Ch. 7 The Nervous System
Marieb - Essentials of Human Anatomy & Physiology 13th Edition
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMarieb 13th EditionCh. 7 The Nervous SystemProblema 20
Capitolo 7, Problema 20

Name the four major nerve plexuses formed by the ventral rami and the body region served by each.

Guida verificata passo dopo passo
1
Identify what a nerve plexus is: A nerve plexus is a network of intersecting nerves formed by the ventral rami of spinal nerves. These plexuses allow for the redistribution of nerve fibers to serve specific body regions.
Understand the four major nerve plexuses: The four major nerve plexuses are the cervical, brachial, lumbar, and sacral plexuses. Each serves distinct regions of the body.
Describe the cervical plexus: The cervical plexus is formed by the ventral rami of spinal nerves C1-C4. It serves the neck region and parts of the head, including the phrenic nerve, which controls the diaphragm.
Describe the brachial plexus: The brachial plexus is formed by the ventral rami of spinal nerves C5-T1. It serves the shoulders, arms, and hands, providing motor and sensory innervation to these regions.
Describe the lumbar and sacral plexuses: The lumbar plexus is formed by the ventral rami of spinal nerves L1-L4 and serves the lower abdomen, thighs, and parts of the legs. The sacral plexus is formed by the ventral rami of spinal nerves L4-S4 and serves the pelvis, buttocks, and lower limbs, including the sciatic nerve.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
4m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Nerve Plexuses

Nerve plexuses are networks of intersecting nerves that arise from the ventral rami of spinal nerves. They allow for the redistribution of nerve fibers to form peripheral nerves that innervate specific body regions. The major plexuses include the cervical, brachial, lumbar, and sacral plexuses, each serving distinct areas of the body.
Video consigliato:
2:25
Nerves and Blood Supply

Cervical Plexus

The cervical plexus is formed by the ventral rami of the first four cervical nerves (C1-C4). It primarily innervates the neck, parts of the shoulder, and diaphragm through the phrenic nerve. This plexus is crucial for motor and sensory functions in the upper body and plays a significant role in breathing.
Video consigliato:
5:17
The Spine Example 1

Brachial Plexus

The brachial plexus is formed by the ventral rami of spinal nerves C5 to T1. It innervates the upper limb, including the shoulder, arm, and hand, through major nerves such as the median, ulnar, and radial nerves. This plexus is essential for both motor control and sensory perception in the upper extremities.
Video consigliato:
5:41
Muscle Actions
Pratica correlata
Domanda del libro di testo

Other than serving as a conduction pathway, what is a major function of the pons? Why is the medulla oblongata the most vital part of the brain?

715
views
Domanda del libro di testo

Mrs. Chen, a new mother, brings her infant to the clinic because he has suffered repeated seizures. When questioned, she states that her labor was unusually long and difficult. What condition do you suspect? Will the infant's condition worsen?

744
views
Domanda del libro di testo

Joseph, a man in his early 70s, was having problems chewing his food. He was asked to stick out his tongue. It deviated to the right, and its right side was quite wasted. What cranial nerve was impaired?

679
views
Domanda del libro di testo

How many pairs of cranial nerves are there? Which are purely sensory? Which activates the chewing muscles? Which helps regulate heart rate and activity of the digestive tract?

776
views
Domanda del libro di testo

What region of the body is served by the dorsal rami of the spinal nerves? By the ventral rami?

1146
views
Domanda del libro di testo

A semiconscious young woman is brought to the hospital by friends after falling from a roof. She did not lose consciousness immediately, and she was initially lucid. After a while, though, she became confused and then unresponsive. What is a likely explanation of her condition?

816
views