The Spinal Cord
The posterior funiculus is located between the posterior median septum and the medial edge of the horn (Fig. 9.3). At cervical levels, this area consists of the gracile and cuneate fasciculi; collectively, these are commonly referred to as the posterior (dorsal) columns.
What is the difference between funiculus and fasciculus?
As nouns the difference between fasciculus and funiculus
is that fasciculus is (anatomy) a small bundle of nerve, muscle or tendon fibers while funiculus is (anatomy) any of several cordlike structures, especially the umbilical cord, or a bundle of nerve fibres in the spinal cord.
What is the function of anterior funiculus?
The ventral spinothalamic tract, located in the anterior funiculus, transmits crude touch and pressure sensation. The lateral spinothalamic tract lies in the ventral part of the lateral funiculus and transmits pain and temperature sensation.
What is the grey matter?
Gray matter, named for its pinkish-gray color, is home to neural cell bodies, axon terminals, and dendrites, as well as all nerve synapses. This brain tissue is abundant in the cerebellum, cerebrum, and brain stem. It also forms a butterfly-shaped portion of the central spinal cord.
What is the ventral Funiculus?
ventral funiculus the white substance of the spinal cord lying on either side between the ventral median fissure and the ventral roots of the spinal nerves.
What is cauda equina made of?
The cauda equina (from Latin horse’s tail) is a bundle of spinal nerves and spinal nerve rootlets, consisting of the second through fifth lumbar nerve pairs, the first through fifth sacral nerve pairs, and the coccygeal nerve, all of which arise from the lumbar enlargement and the conus medullaris of the spinal cord.
What fiber tract is located in the posterior funiculus?
The posterior funiculus contains large myelinated nerve fibers of posterior root ganglion cells. The peripheral processes of these ganglion cells form or innervate sensory receptors in the skin and deep tissues of the body.
What is funiculus in flower?
Funiculus: The stalk by which an ovule or seed is connected to the placenta in the ovary. The funiculus acts like an umbilical cord, supplying the developing ovule and seed with water and nutrients from the parent plant.* The funiculi attaching each of these developing pea seeds are easy to see along the pod’s midrib.
What’s a fasciculus?
Medical Definition of fasciculus
: a slender bundle of fibers: a : a bundle of skeletal muscle cells bound together by fasciae and forming one of the constituent elements of a muscle.
Is the anterior funiculus a part of the spinal cord?
one of the three major subdivisions of the white matter of the spinal cord, the anterior funiculi contain various ascending and descending tracts, including the anterior corticospinal tract.
What is posterior root ganglion?
A dorsal root ganglion (or spinal ganglion; also known as a posterior root ganglion) is a cluster of neurons (a ganglion) in a dorsal root of a spinal nerve. The cell bodies of sensory neurons known as first-order neurons are located in the dorsal root ganglia.
What do lateral funiculus contain?
one of the three major subdivisions of white matter in the spinal cord, the lateral funiculi contain various ascending and descending tracts. Important pain pathways, like the spinothalamic tract, are found here as well as the lateral corticospinal tract, an important descending pathway for voluntary movement.
Why is grey matter important?
[6] The grey matter throughout the central nervous system allows enables individuals to control movement, memory, and emotions. Different areas of the brain are responsible for various functions, and grey matter plays a significant role in all aspects of human life.
What happens if grey matter is damaged?
Damage essentially cuts off or limits communication between areas of grey matter (neuron cell bodies and dendrites, the neuropil, glial cells, and capillaries). Perhaps the easiest example to envision is a spinal cord injury.
What is the difference between white matter and grey matter?
The central nervous system of the brain is made up of two kinds of tissue: grey matter and white matter. The grey matter contains the cell bodies, dendrites and the axon terminals, where all synapses are. The white matter is made up of axons, which connect different parts of grey matter to each other.
