Dictionary > Thoracic spinal nerve

Thoracic spinal nerve

noun, plural: thoracic spinal nerves
Any of the twelve pairs of nerves that emerge from the thoracic region of the spinal cord, through the thoracic vertebrae of the vertebral column, and proceed to the paravertebral ganglia of the autonomic nervous system
The spinal nerve is a nerve that occurs in pairs emerging from the spinal cord. Each pair is attached to the cord by two roots, i.e. the anterior (ventral) and posterior (dorsal) roots. Although these two roots unite in the intervertebral foramen they divide again into anterior division (or ventral ramus) and posterior division (or dorsal ramus).1 In humans, there are 31 pairs of spinal nerves emerging from the spinal cord and are grouped based on the corresponding regions of the vertebral column, i.e. cervical spinal nerves, thoracic spinal nerves, lumbar spinal nerves, sacral spinal nerves, and coccygeal spinal nerves. These nerves emerge from the spinal cord through an opening called intervertebral foramen (an opening between adjacent vertebrae of the vertebral column).
The thoracic spinal nerves are spinal nerves emerging from the thoracic region of the spinal cord. They all emerge above their corresponding vertebrae. The thoracic spinal nerves are as follows:

  • thoracic spinal nerve 1 (T1)
  • thoracic spinal nerve 2 (T2)
  • thoracic spinal nerve 3 (T3)
  • thoracic spinal nerve 4 (T4)
  • thoracic spinal nerve 5 (T5)
  • thoracic spinal nerve 6 (T6)
  • thoracic spinal nerve 7 (T7)
  • thoracic spinal nerve 8 (T8)
  • thoracic spinal nerve 9 (T9)
  • thoracic spinal nerve 10 (T10)
  • thoracic spinal nerve 11 (T11)
  • thoracic spinal nerve 12 (T12)

See also:

  • spinal nerve
  • Reference(s):

    1 spinal nerve. (n.d.). The American Heritage® Science Dictionary. Retrieved from Dictionary.com website http://www.dictionary.com/browse/spinal-nerve

    You will also like...

    Early Earth
    The Origins of Life

    This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

    Adaptation Tutorial
    Adaptation Tutorial

    Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    New Zealand - Biodiversity fauna
    New Zealand’s Biodiversity

    Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..

    Principles of Hormonal Control Systems
    Principles of Hormonal Control Systems

    Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..