What is nuchal region?
The nuchal region, otherwise known as the posterior region of the neck or the posterior cervical region, is the area at the back of the neck situated deep to the trapezius muscle. It contains the spinal cord, cervical vertebrae and all the associated muscles.
What is the function of the nuchal lines?
These lines form anatomical reference points that can be useful in examinations of the skull. They are also points of attachment for some of the muscles involved in the control of the head and neck. The superior nuchal line forms points of attachment for several muscles, including the trapezius.
What attaches to the nuchal line?
Below the highest nuchal line is the superior nuchal line. To it is attached, the splenius capitis muscle, the trapezius muscle, and the occipitalis.
What Innervates the muscles of the anterior neck?
The muscle is innervated by anterior rami of spinal nerves C1-C3, and vascularized by the ascending pharyngeal artery, ascending cervical branch of the inferior thyroid artery and the muscular branches of the vertebral artery.
What does the word nuchal mean?
Definition of nuchal : of, relating to, or lying in the region of the nape.
What is the nuchal plane?
n. The external surface of the squamous part of the occipital bone giving attachment to the muscles of the back of the neck.
What does the inferior nuchal line do?
Running from the middle of the median nuchal line, across either half of the nuchal plane is the inferior nuchal line. The inferior nuchal line and the area below it receive the insertions of the Recti capitis posteriores major and minor.
What does nuchal line mean?
Medical Definition of nuchal line : any of several ridges on the outside of the skull: as. a : one on each side that extends laterally in a curve from the external occipital protuberance to the mastoid process of the temporal bone.
What muscles are innervated by C3 C4?
Supraclavicular nerve: This branch is formed by the C3 and C4 nerves, and it emerges as a common trunk under cover of the sternocleidomastoid muscle and sends small branches to the skin of the neck. Some of those branches of this branch (supraclavicular) also cross the clavicle to supply the skin over the shoulder.
Which nerve plexus Innervates the muscles of the neck and diaphragm?
The cervical plexus is located below the sternocleidomastoid muscle. Its sensory fibers carry exteroceptive information from scalp, neck, and chest, and proprioceptive information from muscles, tendons, and joints. Its motor fibers innervate cervical muscles and diaphragm.
What is nuchal skeleton?
The nuchal skeleton is a non-cellular laminated thickening of basement-membrane underlying that portion of the stomochord which lies between the above-mentioned pouches and the orifice into the throat.
What does translucency mean?
adjective. permitting light to pass through but diffusing it so that persons, objects, etc., on the opposite side are not clearly visible: Frosted window glass is translucent but not transparent. easily understandable; lucid: a translucent explication.
Where is the nuchal crest?
noun. 1A crest of feathers, hair, scales, or skin on the back of the neck. 2A ridge at the back of the skull to which ligaments and muscles of the neck are attached.
What is superior nuchal line?
The superior and inferior nuchal lines form attachments with the muscles and ligaments that stabilize the articulation of the occipital condyles with the atlas, thereby balancing the mass of the head over the cervical vertebrae.
Where is the inferior nuchal line?
occipital bone
On the posterior outer surface of the occipital bone, a ridge extending laterally from either side of the greater occipital crest 1to 2 cm below the greater external occipital protuberance and curving slightly upward at its end.
Does the phrenic nerve innervate the heart?
In humans, the right and left phrenic nerves are primarily supplied by the C4 spinal nerve, but there is also contribution from the C3 and C5 spinal nerves. From its origin in the neck, the nerve travels downward into the chest to pass between the heart and lungs towards the diaphragm.
What is transparent and translucent?
Difference Between Transparent and Translucent Materials Transparent objects appear to be colorless as they do not reflect light. Translucent materials allow partial transmission of light rays. These materials form hazy or blurred images of objects seen through them.
What is the meaning of nuchal crest?
1A crest of feathers, hair, scales, or skin on the back of the neck. 2A ridge at the back of the skull to which ligaments and muscles of the neck are attached.
What is the inferior nuchal line?
Inferior view, median nuchal line The nuchal lines of the occipital bone are where many muscles and ligaments of the neck and back attach to the skull. Generally areas that serve as points of attachment for muscles have raised bone due to the stress on the bone and the stimulation that causes bone growth.
What muscles are innervated by C3 and C4?
What does C6 and C7 innervate?
Cords. From the lateral cord, C5, C6, and C7 supply the pectoralis major and minor muscles, via the lateral and medial pectoral nerves, as well as the coracobrachialis, brachialis and biceps brachii, via the musculocutaneous nerve. The musculocutaneous nerve provides sensation to the skin of the lateral forearm.