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When T1 is compromised, the symptoms are unique and often dramatic.
The T1 nerve is responsible for a "division of labor" involving the thorax, the arm, and the head.
The motor fibers of T1 are vital for hand dexterity. They provide primary innervation to the . These are the muscles located within the hand itself (as opposed to the forearm).
T1 is the primary source of sympathetic innervation to the . These preganglionic sympathetic fibers ascend the sympathetic chain to synapse in the Superior Cervical Ganglion. From there, they travel on blood vessels to reach the eye.
: T1 joins the C8 nerve root to form the lower trunk of the brachial plexus.
Because T1 carries the sympathetic fibers for the eye, injury to this nerve can result in Horner’s Syndrome. This is often seen in Pancoast tumors (lung cancer located at the apex of the lung) that invade the T1 nerve root.
T1 is the lowest (inferior) root of the brachial plexus. It contributes fibers to the Inferior Trunk of the plexus. From here, T1 fibers travel a long distance down the arm. They eventually form major peripheral nerves, including the Ulnar Nerve and the Median Nerve .
When T1 is compromised, the symptoms are unique and often dramatic.
The T1 nerve is responsible for a "division of labor" involving the thorax, the arm, and the head.
The motor fibers of T1 are vital for hand dexterity. They provide primary innervation to the . These are the muscles located within the hand itself (as opposed to the forearm).
T1 is the primary source of sympathetic innervation to the . These preganglionic sympathetic fibers ascend the sympathetic chain to synapse in the Superior Cervical Ganglion. From there, they travel on blood vessels to reach the eye.
: T1 joins the C8 nerve root to form the lower trunk of the brachial plexus.
Because T1 carries the sympathetic fibers for the eye, injury to this nerve can result in Horner’s Syndrome. This is often seen in Pancoast tumors (lung cancer located at the apex of the lung) that invade the T1 nerve root.
T1 is the lowest (inferior) root of the brachial plexus. It contributes fibers to the Inferior Trunk of the plexus. From here, T1 fibers travel a long distance down the arm. They eventually form major peripheral nerves, including the Ulnar Nerve and the Median Nerve .
