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Brainstem

Brainstem

The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...

Brainstem: Control Centers of Medulla

Brainstem: Control Centers of Medulla

The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...

Cerebellum: Anatomical Regions

Cerebellum: Anatomical Regions

The cerebellum, also known as the "little brain," is located in the posterior cranial fossa, inferior to the tentorium cerebelli and dorsal to the brainstem. It plays a significant role in motor control, coordination, and proprioception.
Cerebellar Structure
Externally, the cerebellum features a highly convoluted surface with numerous folia (narrow ridges) separated by shallow sulci (grooves). The cerebellum is divided into two hemispheres by a thin median structure known as the vermis. The...

Cerebral Hemispheres

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...

Secondary Spinal Cord Injury llI: Pathophysiology

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

Hemorrhagic Stroke ll: Pathophysiology

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

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Related Experiment Video

Updated: Jun 21, 2026

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Published on: August 16, 2024

Brainstem disconnection.

Curtis Duffield¹, Jennifer Jocson, Sandra L Wootton-Gorges

¹Department of Radiology, University of California Davis, Medical Center, UC Davis Children's Hospital, Sacramento, CA 95817, USA.

Pediatric Radiology

|August 12, 2009

Summary

This summary is machine-generated.

This study details a rare neonatal brainstem disconnection, presenting unique neurological and physical abnormalities in a newborn. Advanced MRI revealed brainstem and cerebellar structural anomalies, aiding diagnosis.

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Area of Science:

Neonatal neurology
Developmental abnormalities
Medical imaging

Background:

Brainstem disconnection is an exceedingly rare neonatal abnormality, with only seven cases previously documented.
This condition affects the structural integrity of the brainstem, impacting neurological development.

Observation:

A unique case of a neonate presenting with hypertonia, dysmorphic facial features, and respiratory distress is described.
The neonate also exhibited multiple musculoskeletal and genitourinary abnormalities.

Findings:

Cerebral Magnetic Resonance Imaging (MRI) revealed a disconnection between the pons and medulla.
Associated findings included cerebellar hypoplasia and absent cerebellar peduncles.
MRI was instrumental in characterizing the neurological and vascular anomalies.

Implications:

This case expands the understanding of brainstem disconnection's clinical and radiological spectrum.
Highlights the utility of advanced neuroimaging in diagnosing rare neonatal disorders.
Contributes to the limited literature on this severe congenital anomaly.