The dorsal rami serve the skin and musculature of the posterior body trunk.
The dorsal rami of a single spinal segment monitor sensory information from the skin on the back of the body, including the muscles and joints in that region. They provide sensation for a specific dermatome, which is a specific area of skin innervated by the spinal nerves from that segment.
Anterior branches of thoracic spinal nerves.
White rami communicantes (sing. ramus communicans) are literally white branches of communication between each spinal nerve and the sympathetic trunk. Their color is white because these lines of communication contain mainly myelinated nerve fibers of pre-ganglionic general visceral efferents from the spinal cord. Many of the pre-ganglionic nerve fibers synapse at the corresponding spinal segment level, and thus build a sympathetic ganglion at that level. Other pre-ganglionic white fibers either ascend or descend in the sympathetic trunk before synapsing in sympathetic ganglia above or below the spinal segment of origin. The sympathetic ganglia are literally knots in the sympathetic cord primarily containing cell bodies of the post-ganglionic neurons, whose axons are unmyelinated and gray in color. These unmyelinated post-ganglionic nerve fibers rejoin the spinal nerve at that level via the gray rami communicantes,as well as ascending or descending to adjacent levels. The white rami may also contain lightly myelinated sympathetic afferents whose cell bodies in the dorsal root ganglia synapse in the dorsal horn gray of the spinal cord. ANSWER: Carry preganglionic axons to the sympathetic chain
alpha spinal motor neuron axons leave the spinal column and enter the nerves via the ventral rami.
Except for T2-T12, all ventral rami branch and join one another lateral to the vertebral column, forming complicated interlacing nerve networks called nerve plexuses. Nerve plexuses occur in the cervical, brachial, lumbar, and sacral regions and primarily serve the limbs (MarieB, 2010 8th ed. pp. 502)
The dorsal rami are small branches of spinal nerves that emerge from the spinal cord and supply the skin and muscles of the back. They are responsible for providing sensory and motor innervation to the back of the body.
Skin and deep muscles of the back.
skeletal muscles
The dorsal rami of a single spinal segment monitor sensory information from the skin on the back of the body, including the muscles and joints in that region. They provide sensation for a specific dermatome, which is a specific area of skin innervated by the spinal nerves from that segment.
Posterior Belly of Digastric Muscle (innervated by CN VII) Facial nerve Sternocleidomastoid (innervated by CN XI) Spinal accessory nerve Longissimus Capitis (innervated by dorsal rami of C3-C8 spinal nerves) Splenius Capitis (innervated by dorsal rami of middle cervical spinal nerves)
sensory; mixed
The roots are two split bases of spinal nerves that connect to the spinal cord. The rami are branches of the spinal nerve that form a complex system throughout the body with the two primary ones being the dorsal (posterior) ramus and the anterior ramus. A diagram would look like an x with the two roots coming together from the spinal cord to go through the intervertebral forming a spinal nerve then splitting again immediately after the intervertebral foramen forming the rami of the spinal nerve
The ventral rami serves as a form of intercostal nerves, which supply the muscles between the ribs and the skin and muscles of the anterior and lateral trunk.
spinal nerves
plexuses
The ventral rami of spinal nerves C5 to T1 contribute fibers to the brachial plexus. This plexus is responsible for innervating the muscles and skin of the shoulder, arm, and parts of the hand. It plays a crucial role in motor and sensory functions of the upper limb.
Anterior branches of thoracic spinal nerves.