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15 Ιουν 2023 · On the other hand, the motor branches of the cervical plexus form the ansa cervicalis (C1-C3), which is a nerve loop innervating the infrahyoid muscles in the anterior cervical triangle. They also form the phrenic nerve (C3-C5) which supplies the diaphragm and the pericardium of the heart.
- Phrenic Nerve
The phrenic nerve is a mixed nerve arising from the anterior...
- Phrenic Nerve
30 Οκτ 2023 · The phrenic nerve is a mixed nerve arising from the anterior rami of C3-C5 spinal nerves, which are components of the cervical plexus. It arises in the neck and descends vertically through the thorax to end on the diaphragm.
12 Οκτ 2023 · Phrenic Nerve. The phrenic nerve arises from the anterior rami of C3-C5. It provides motor innervation to the diaphragm. After arising from the cervical plexus, the nerve travels down the surface of the anterior scalene muscle and enters the thorax. In the thoracic cavity, the nerve descends anteriorly to the root of the lung to reach the ...
Its branches consist of a superficial and deep set. The superficial branches are the great auricular nerve, lesser occipital nerve, transverse cervical, suprasternal, and supraclavicular nerves. The deep branches are the phrenic, communicantes cervicales, communicating, and muscular. [1]
The phrenic nerve is an important branch of the cervical plexus. It is formed at the posterior border of the anterior scalene muscle by fibres from C3, 4 and 5 nerve roots. From here the left and right nerves follow slightly different courses down through the mediastinum.
26 Οκτ 2019 · The phrenic nerve is a bilateral, mixed nerve that originates from the cervical nerves in the neck and descends through the thorax to innervate the diaphragm. It is the only source of motor innervation to the diaphragm and therefore plays a crucial role in breathing.
The phrenic nerve originates mainly from the 4th cervical nerve, but also receives contributions from the 3rd and 5th cervical nerves (C3-C5) in humans. Thus, the phrenic nerve receives innervation from parts of both the cervical plexus and the brachial plexus of nerves.
