What is the anterolateral sulcus?
The Anterolateral sulcus of spinal cord is a landmark on the anterior side of the spinal cord. It denotes the location at which the ventral fibers leave the spinal cord. The anterolateral sulcus is less visible than the posterolateral sulcus.
Where is anterolateral sulcus?
medulla oblongata
The anterolateral sulcus (or ventrolateral sulcus) is a sulcus on the side of the medulla oblongata between the olive and pyramid. The rootlets of the hypoglossal nerve (CN XII) emerge from this sulcus. Anterolateral sulcus is visible at #8.
What are the three groups of nuclei in the medulla oblongata?
The respiratory center is a complex group of nuclei located within the pons and medulla oblongata. It consists of three parts: the dorsal respiratory group, ventral respiratory group and pneumotaxic center.
What is the anterior median fissure of the spinal cord?
The anterior median fissure provides a groove in which the anterior spinal artery sits. From here, it provides the anterior part of the spinal cord. It is sourced from the segmental medullary arteries and the segmental spinal arteries which are sourced from the intercostal arteries.
What is the dorsal Funiculus?
dorsal funiculus the white substance of the spinal cord lying on either side between the posterior median sulcus and the dorsal root. lateral funiculus (funiculus latera´lis) the lateral mass of fibers on either side of the spinal cord, between the anterolateral and posterolateral sulci.
What is the difference between a fissure and a sulcus?
The terms fissure and sulcus as they are classically de- fined are: a fissure separates one lobe from another, while a sulcus is within a lobe and delimits gyri. The fissures and sulci of the cerebral hemispheres can be arranged into three groups according to their location.
What are pyramids in medulla oblongata?
Description. The medullary pyramids are paired white matter structures of the brainstem’s medulla oblongata that contain motor fibers of the corticospinal and corticobulbartracts – known together as the pyramidal tracts. The lower limit of the pyramids is marked when the fibers cross (decussate).
Which nucleus in the medulla is connected to the inferior colliculus?
A range of brain stem nuclei — collections of neurons, or gray matter — connect to the inferior colliculus. All of them attach to the core nucleus bilaterally (at both lobes) with the exception of the lateral lemniscus, a bundle of sensory nerve fibers that comes from the cochlear nucleus of the brain stem.
What is the function of sulcus?
Sulci and brain gyri are involved in increasing the surface area of the cerebral cortex forming brain divisions. This increase in the brain’s surface area permits more neurons to be packed into the cortex for information processing.
What is fissures of spinal cord?
What is anterior fissure?
Medical Definition of anterior median fissure : a groove along the anterior midline of the spinal cord that incompletely divides it into symmetrical halves. — called also ventral median fissure.
What is difference between funiculus and fasciculus?
A funiculus is a small bundle of axons (nerve fibres), enclosed by the perineurium. A small nerve may consist of a single funiculus, but a larger nerve will have several funiculi collected together into larger bundles known as fascicles. Fascicles are bound together in a common membrane, the epineurium.
Where are funiculus located?
The Spinal Cord
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 does the fissure do in the brain?
Function. Essentially, the fissure’s purpose is to separate the brain into two hemispheres, left and right.
What are medullary pyramids important for?
The two pyramids contain the motor fibers that pass from the brain to the medulla oblongata and spinal cord. These are the corticobulbar and corticospinal fibers that make up the pyramidal tracts.
How many medullary pyramids are there?
Between seven and eighteen pyramids exist in the innermost part of the kidney, which is called the renal medulla; in humans, there are usually only seven of the pyramids.
What is an anal fissure?
An anal fissure is a small tear in the thin, moist tissue (mucosa) that lines the anus. An anal fissure may occur when you pass hard or large stools during a bowel movement. Anal fissures typically cause pain and bleeding with bowel movements.
What is an annular fissure in the lumbar?
What is an annular fissure in the lumbar spine? An annular fissure in the lumbar spine is a deficiency of one or more layers of the annulus fibrosus (outer covering the lumbar disc). The disc has an inner part, called the nucleus pulposus. The outer part, the annulus fibrosus bascially contains the inner part (nucleus pulposus).
How do you treat an annular fissure?
Treatment. Conservative treatment for an annular tear or fissure is generally sufficient to keep the pain and other symptoms at bay. These may include pain medication, either over the counter or by prescription, and/or physical therapy. Physical therapy treatment may include exercises, traction and more.
How common are annual fissures in the back?
Medical research shows that annual fissures are common and a normal finding in people without lower back pain. Although some types of annual fissures are more likely to be associated with pain, particularly fissures that extend all the way through the annulus fibrosus.