What is the Pontomedullary Junction?
The term pontomedullary junction refers to the boundary of the pons and the medulla oblongata where the abducens nerve, the facial nerve and the vestibulocochlear nerve join the hindbrain. The motor nucleus of the seventh nerve is located at the pontomedullary junction.
Which cranial nerves is from Pontomedullary Junction?
Three other cranial nerves are located at the pontomedullary junction: the abducens nerve (cranial nerve VI), the facial nerve(cranial nerve VII), and the vestibulocochlear nerve (cranial nerve VIII).
What is Pontomedullary reticular formation?
The pontomedullary reticular formation (RF) is a key site responsible for integrating descending instructions to execute particular movements. The indiscrete nature of this region has led not only to some inconsistencies in nomenclature, but also to difficulties in understanding its role in the control of movement.
What is cerebellum function?
The cerebellum is important for making postural adjustments in order to maintain balance. Through its input from vestibular receptors and proprioceptors, it modulates commands to motor neurons to compensate for shifts in body position or changes in load upon muscles.
Which brain part controls heart rate?
The brain stem sits beneath your cerebrum in front of your cerebellum. It connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate and blood pressure.
Which part of the brain regulates sleep?
hypothalamus
The hypothalamus, a peanut-sized structure deep inside the brain, contains groups of nerve cells that act as control centers affecting sleep and arousal.
Is the pons GREY or white matter?
The gray matter of pons can be homologous to the spinal cord, such as cranial nerve nuclei, or the gray matter of its own. Pontine gray matter includes pontine nuclei, the gray matter of reticular formation, the superior olivary nucleus, trapezoid body nucleus, and nucleus of the lateral lemniscus.
What is the purpose of reticular formation?
The brainstem reticular formation (RF) represents the archaic core of those pathways connecting the spinal cord and the encephalon. It subserves autonomic, motor, sensory, behavioral, cognitive, and mood-related functions.
What is the role of the reticular activating system?
The reticular activating system’s fundamental role is regulating arousal and sleepâwake transitions. The ascending reticular activating system projects to the intralaminar nuclei of the thalami, which projects diffusely to the cerebral cortex.
What happens when cerebellum is damaged?
Damage to the cerebellum can lead to: 1) loss of coordination of motor movement (asynergia), 2) the inability to judge distance and when to stop (dysmetria), 3) the inability to perform rapid alternating movements (adiadochokinesia), 4) movement tremors (intention tremor), 5) staggering, wide based walking (ataxic gait …