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What is the psoas nerve?
The psoas nerve is the nerve that innervates the psoas major muscle. It is formed by fibers of spinal nerves L2-L4.
What is the cardioacceleratory center?
innervates SA and AV nodes, heart muscle, and coranary arteries through parasympathetic fibers in the vagus nerves
What is a plexus?
A plexus (from the Latin plectere,meaning "braid") is an interwoven network of spinal nerves. There are four major plexuses on each side of the body: 1) the cervical plexus innervates the muscles of the neck, the skin of the neck, the back of the head, and the diaphragm muscle; 2) the brachialplexus innervates the shoulder and upper limb; 3) the lumbar plexus innervates the muscles and skin of the abdominal wall; and 4) the sacral plexus innervates the buttocks and lower limbs. The nerves then divide into smaller branches.
This nerve innervates most of the viscera in the thoracic and abdominopelvic cavities?
The vagus nerve (cranial nerve X) innervates most of the viscera in the thoracic and abdominopelvic cavities, including the heart, lungs, stomach, liver, and intestines. It plays a major role in regulating essential functions such as heart rate, digestion, and breathing.
What innervates the skin and muscles of the back in spinal nerves?
dorsal ramus
What is it called when muscles and nerves group together?
When muscles and nerves group together, it is called a motor unit. A motor unit consists of a single motor neuron and all the muscle fibers it innervates. When the motor neuron fires, all the muscle fibers in the motor unit contract together.
What is found in the walls of organs or viscera?
In the walls of organs or viscera, you would typically find layers of tissue that provide structural support, regulate blood flow, and facilitate the organ's function. These layers may include smooth muscle, connective tissue, nerves, and blood vessels.
What nerve governs most of the extrinsic eye muscle?
Trochlear Nerve innervates Superior Oblique(extrinsic eye muscle)Oculomotor Nerve innervates Inferior Oblique, Superior Rectus, Inferior Rectus, and Medial Rectus (which are all extrinsic eye muscles) along with Ciliary Body, and the Iris (which are both intrinsic eye muscles)Abducens Nerve innervates Lateral Rectus(extrinsic eye muscle)
What do muscle nerves do?
muscle nerves carry messages from the brain to tell the muscle to contract.
What organ is connected to both a cranial nerve and the pelvic nerves?
The bladder is connected to both the pelvic nerves and cranial nerve X (vagus nerve). The vagus nerve innervates the smooth muscle of the bladder and contributes to its control and function. Additionally, the pelvic nerves play a key role in controlling the muscles of the bladder and genitalia.
What major nerves serve the anterior thigh?
The major nerves that serve the anterior thigh are the femoral nerve and the obturator nerve. The femoral nerve innervates the quadriceps muscles, while the obturator nerve innervates the adductor muscles of the thigh.
What is the brachial plexus group?
This group of nerves innervates the muscles and skin of the entire upper limbs except the Trapezius muscle and the skin near the axilla (arm pit). The plexus comes off the spinal cord at C4,C5,C6,C7,C8 and T1 where they mix and form a plexus. There are 5 main nerves that are formed: Musculocutaneous, axillary, radial, median and ulnar nerves.
