Results for "fMRI"
Anatomy Encyclopedia Entry 1780033925
The human brain is a complex and intricate organ responsible for controlling the body's functions, facilitating thought, emotion, and movement, and enabling humans to experience the world around them.
Health & MedicineAnatomy Encyclopedia Entry 1778386520
** The **Human Brain** is the central organ of the human nervous system, responsible for controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior. **CONTENT:** ### Overview The human brain is a complex and intricate organ, consisting of approximately 86 billion neurons and trillions of synapses. It is protected by the skull and is divided into three main parts: the **cerebrum**, the **cerebellum**, and the **brainstem**. The cerebrum is the largest part of the brain and is responsible for processing sensory information, controlling movement, and facilitating thought, emotion, and behavior. The cerebellum is located at the base of the brain and is involved in coordinating movement and balance. The brainstem connects the cerebrum to the spinal cord and regulates basic functions such as breathing, heart rate, and blood pressure. The human brain is a highly dynamic and adaptable organ, capable of reorganizing itself in response to injury or disease. This process, known as **neuroplasticity**, allows the brain to compensate for damaged areas and adapt to new situations. The brain is also highly energy-intensive, consuming approximately 20% of the body's total energy expenditure. ### History/Background The study of the human brain dates back to ancient civilizations, with evidence of brain dissection and study found in ancient Egyptian and Greek texts. However, it wasn't until the 19th century that the modern field of neuroscience began to take shape. The discovery of the **neuron** by Santiago Ramón y Cajal in 1889 marked a major breakthrough in our understanding of the brain's structure and function. The development of **electroencephalography (EEG)** in the early 20th century allowed researchers to study the brain's electrical activity, while the invention of **functional magnetic resonance imaging (fMRI)** in the 1990s enabled the visualization of brain activity in real-time. ### Key Information The human brain is composed of several distinct regions, each with its own unique function and structure. The **cerebral cortex** is the outer layer of the brain, responsible for processing sensory information and facilitating thought, emotion, and behavior. The **basal ganglia** are a group of structures involved in movement control and habit formation. The **limbic system** is a network of structures that play a key role in emotion, motivation, and memory. The brain is also home to several key systems, including the **nervous system**, which transmits and processes information, and the **endocrine system**, which regulates hormone production and secretion. The brain is also highly susceptible to injury and disease, with conditions such as **stroke**, **traumatic brain injury**, and **neurodegenerative diseases** such as **Alzheimer's** and **Parkinson's** affecting millions of people worldwide. ### Significance The human brain is a remarkable and complex organ, responsible for controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior. The study of the brain has led to numerous breakthroughs in our understanding of human behavior, cognition, and emotion, and has paved the way for the development of new treatments and therapies for a range of neurological and psychiatric conditions. **INFOBOX:** - Name: Human Brain - Type: Organ - Date: 1889 (discovery of the neuron) - Location: Skull - Known For: Controlling and coordinating the body's functions, processing information, and facilitating thought, emotion, and behavior **TAGS:** brain, neuroscience, neuroplasticity, neuron, EEG, fMRI, cerebral cortex, basal ganglia, limbic system, nervous system, endocrine system, stroke, traumatic brain injury, neurodegenerative diseases, Alzheimer's, Parkinson's.