Both phrenic nerves arise from the C3, C4 and C5 nerve roots in the cervical spine at the back of the neck, according to The right and left phrenic nerves are sensory and motor nerves that control moveme... More » Science Human Anatomy Nerves

The phrenic nerve controls the diaphragm, a muscle located under the lungs. The phrenic nerve signals the diaphragm muscle to contract when a person is about to inhale. When the diaphragm muscle contracts, it moves downw... More »

Injury to the phrenic nerve can paralyze the diaphragm and have a serious impact on the regulation of breathing, such as difficulty during inhalation, according to the UCLA Division of Plastic & Reconstructive Surgery. T... More »

The brachial plexus is a network of nerves that transmits signals from the spine to the outer extremities of the upper body, according to Mayo Clinic. The brachial plexus controls the hands, arms and shoulders. More » Science Human Anatomy Nerves

The L3 to L4 level is found in the lower part of the spine in the small of the back, beneath the ribs and above the pelvis. This is the lumbar region. The vertebrae there are responsible for supporting the body's weight. More » Science Human Anatomy Nerves

The sciatic nerve originates in the lower spine with nerve roots that exit the spinal cord, and it extends down the back of the body from the legs to the toes, notes It exits the spinal cord through gap... More » Science Human Anatomy Nerves

The main difference between C3, C4 and CAM plants is the way these plants minimize water loss. All of these plants are able to adapt to arid, high heat and light environmental conditions. More »