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.
What are the functions of the cervical plexuses?
The function of the cervical plexus is to provide skeletal muscle control of the neck and upper torso as well as providing cutaneous sensation to parts of the occiput, neck, and shoulder. The greater occipital nerve originates from the second cervical nerve independent of the cervical plexus.
How many nerve plexuses are there?
Nerve plexuses are composed of afferent and efferent fibers that arise from the merging of the anterior rami of spinal nerves and blood vessels. There are five spinal nerve plexuses—except in the thoracic region—as well as other forms of autonomic plexuses, many of which are a part of the enteric nervous system.
What are the three primary plexuses?
Spinal Plexuses
- Cervical Plexus—Serves the Head, Neck and Shoulders. ...
- Brachial Plexus—Serves the Chest, Shoulders, Arms and Hands. ...
- Lumbar Plexus—Serves the Back, Abdomen, Groin, Thighs, Knees, and Calves. ...
- Sacral Plexus—Serves the Pelvis, Buttocks, Genitals, Thighs, Calves, and Feet.
Which are nerve plexuses of the body quizlet?
Terms in this set (16)
- Cervical Plexus. originates at C1-C4; innervates neck.
- Lumbar Plexus. originates at L1-L5; innervates lower limbs.
- Sacral Plexus. originates at L4-S4; innervates pelvis, buttocks, and some lower limbs.
- Brachial Plexus. ...
- Median Nerve. ...
- Ulnar Nerve. ...
- Radial Nerve. ...
- Musculocutaneous Nerve.
How many plexuses are there in human body?
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 nerves are part of the lumbosacral plexus?
The major nerves from the lower LP include the superior gluteal nerve (L4-S1), the inferior gluteal nerve (L5-S2), the sciatic nerve (L4-S3), the posterior femoral cutaneous nerve (S1-S3), and the pudendal nerve (S1-S4).
What are four possible effectors of a reflex?
list four possible Effectors of a reflex response. glands, skeletal muscle, cardiac muscle, smooth muscle.
Where are the plexuses located?
Nerve Junction Boxes: The Plexuses
Four nerve plexuses are located in the trunk of the body: The cervical plexus provides nerve connections to the head, neck, and shoulder. The brachial plexus provides connections to the chest, shoulders, upper arms, forearms, and hands.
What are the names of the autonomic nerve plexuses in the body?
The autonomic plexuses include the cardiac plexus, the pulmonary plexus, the esophageal plexus, the abdonimal aortic plexus, and the superior and inferior hypogastric plexuses. Autonomic plexuses are formed from sympathetic postganglionic axons, parasympathetic preganglionic axons, and some visceral sensory axons.
What is the meaning of plexuses?
Definition of plexus
1 : a network of anastomosing or interlacing blood vessels or nerves. 2 : an interwoven combination of parts or elements in a structure or system.
