What structures are in the myelencephalon?
The myelencephalon (spinal cord-like) includes the open and closed medulla, sensory and motor nuclei, projection of sensory and motor pathways, and some cranial nerve nuclei. The caudal end of the myelencephalon develops into the spinal cord.
What is the myelencephalon function?
The myelencephalon Medulla oblongata – Located between the pons and brain stem, the medulla is responsible for basic life support functions like respiration and heart rate. The medulla oblongata also acts as a protective system that eliminates things that don’t belong (sneezing/coughing) in your body.
What does myelencephalon mean?
: the posterior part of the developing vertebrate hindbrain or the corresponding part of the adult brain composed of the medulla oblongata.
Which of the following structures is a part of the rhombencephalon?
The hindbrain is also called the rhombencephalon. It becomes the cerebellum, pons, and medulla.
What is another name for myelencephalon?
The pons (metencephalon or “behind-brain”) and medulla oblongata (myelencephalon or “medulla-brain”) are the two most caudal divisions of the brain, lying between the mesencephalon and the spinal cord.
Why is it called myelencephalon?
It is a complex network of about 100 tiny nuclei that occupies the central core of the brain stem from the posterior boundary of the myelencephalon to the anterior boundary of the midbrain. It is so named because of its netlike appearance (reticulum means “little net”).
What is the 2nd largest part of the brain?
cerebellum
The cerebellum, the second largest portion of the brain, is located below the occipital lobes of the cerebrum. Three paired bundles of myelinated nerve fibers, called cerebellar peduncles, form communication pathways between the cerebellum and other parts of the central nervous system.
Which brain area is the smallest?
The midbrain is the smallest region of the brain, and is located most centrally within the cranial cavity. Limbic System – the limbic system is often referred to as our “emotional brain”, or ‘childish brain’. It is found buried within the cerebrum and contains the thalamus, hypothalamus, amygdala and hippocampus.
Is the myelencephalon part of the spinal cord?
The myelencephalon (spinal cord-like) includes the open and closed medulla, sensory and motor nuclei, projection of sensory and motor pathways, and some cranial nerve nuclei. The caudal end of the myelencephalon develops into the spinal cord.
Is the reticular formation a part of the myelencephalon?
Myelencephalon. An interesting part of the myelencephalon from a psychological perspective is the reticular formation. It is a complex network of about 100 tiny nuclei that occupies the central core of the brain stem from the posterior boundary of the myelencephalon to the anterior boundary of the midbrain.
Is the caudal myelencephalon part of the medulla?
The caudal myelencephalon has a central canal and becomes the closed part of the medulla. Rostrally this canal widens into the fourth ventricle: its floor, derived from myelencephalon (medulla) and metencephalon (pons), has a longitudinal sulcus limitans on each side, separating the alar and basal laminae.
Where are sensory tracts located in the myelencephalon?
Cross sections through the developing myelencephalon at early ( left) and later ( right) stages of embryonic development. Motor tracts (from the basal plate) are shown in green; sensory tracts (from the alar plate) are orange. Adapted from Sadler, T. (1990). Langman’s medical embryology (6th edn.). Baltimore: Williams & Wilkins.