Which is not a nerve plexus?

The intercostal nerves that give rami to the chest and to the upper parts of the abdominal wall efferent motor innervation and to the pleura and peritoneum afferent sensory innervation are the only ones that do not originate from a plexus.

What are the 4 nerve plexuses?

Of the four major nerve plexuses (cervical, brachial, lumbar, and sacral), only the brachial plexus and sacral plexus can be assessed satisfactorily in the EDX laboratory.

What are the four nerve plexuses and their functions?

The cervical plexus supplies nerves to the posterior head and neck, as well as to the diaphragm. The brachial plexus supplies nerves to the arm. The lumbar plexus supplies nerves to the anterior leg. The sacral plexus supplies nerves to the posterior leg.

Which are nerve plexuses of the body quizlet?

Terms in this set (4)
  • cervical plexus. are located deep on each side of the neck, immediately lateral to cervical vertebrae C1-C4 (figure 14.16). …
  • Brachial plexus. networks of nerves that supply the upper limb. …
  • lumber plexus. …
  • sacral plexus.

How many plexuses are there?

Plexuses. The four primary nerve plexuses are the cervical plexus, brachial plexus, lumbar plexus, and the sacral plexus. The choroid plexus is a part of the central nervous system in the brain and consists of capillaries, ventricles, and ependymal cells.

What are the three primary plexuses?

For descriptive purposes, this plexus is usually divided into three parts: lumbar plexus, sacral plexus, and pudendal plexus.

What is a nerve plexus quizlet?

Nerve plexus. A network of nerves in the cervical, brachial, lumbar, and sacral regions.

What convention is used to name autonomic plexuses?

What convention is used to name autonomic nerve plexuses? They are named for the associated organs.

What are the 12 cranial nerve?

In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves: olfactory (CN I), optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), abducent (or abducens; CN VI), facial (CN VII), vestibulocochlear (CN VIII), glossopharyngeal (CN IX), vagus (CN X), accessory (CN XI), and …

What are the phrenic nerves?

The phrenic nerve originates from the anterior rami of the C3 through C5 nerve roots and consists of motor, sensory, and sympathetic nerve fibers. It provides complete motor innervation to the diaphragm and sensation to the central tendon aspect of the diaphragm.

What does C2 nerve innervate?

It originates from the spinal column from above the cervical vertebra 2 (C2). it innervates the rectus capitis anterior and rectus capitis lateralis muscles, and provides sensory nerves to the trapezius.

What is the main nerve of the sacral plexus quizlet?

Terms in this set (39)

The sacral plexus is derived from the anterior rami of spinal nerves L4, L5, S1, S2, S3, and S4. Each of these anterior rami gives rise to anterior and posterior branches. The sacral plexus is formed by the union of the lumbosacral trunk from the anterior rami of L4 and L5.

What are the vagus and phrenic nerves?

The phrenic is the motor and sensory nerve of the diaphragm. The vagus provides the parasympathetic supply for all the organs of the thorax and abdomen. The courses of these two nerves are similar: they both start in the neck, run downward in the mediastinum, and pass through the diaphragm. … Here’s the vagus nerve.

What are intercostal nerves?

The intercostal nerves emerge from the somatic nervous system and aid in the contraction of muscles as well as provide sensory information from the skin and parietal pleura. The intercostal nerves arise from the anterior rami of the thoracic spinal nerves from T1 to T11.

Which of the following nerves is associated with the lumbosacral plexus?

The nerve that originates in the lumbosacral plexus is the sciatic nerve (letter B).

What are vagus nerves?

The vagus nerve carries an extensive range of signals from digestive system and organs to the brain and vice versa. It is the tenth cranial nerve, extending from its origin in the brainstem through the neck and the thorax down to the abdomen.

Is the phrenic nerve a cranial nerve?

The phrenic nerve is a mixed motor/sensory nerve which originates from the C3-C5 spinal nerves in the neck. The nerve is important for breathing because it provides exclusive motor control of the diaphragm, the primary muscle of respiration.
Phrenic nerve
FMA 6191
Anatomical terms of neuroanatomy

What is a plexus?

A plexus is a bundle of intersecting nerves, blood vessels, or lymphatic vessels in the human body. These bundles typically originate from the same anatomical area and serve specific areas of the body.

What is 6th cranial nerve?

It’s also known as the abducens nerve. … The sixth cranial nerve sends signals to your lateral rectus muscle. This is a small muscle that attaches to the outer side of your eye. When this muscle contracts, your eye moves away from your nose. Each eye has its own lateral rectus muscle served by its own cranial nerve.

What is the third cranial nerve?

oculomotor nerve
The oculomotor nerve is the third cranial nerve (CN III). It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid. Cranial nerve III works with other cranial nerves to control eye movements and support sensory functioning.