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brain vocab
| Term | Definition |
|---|---|
| Central Nervous System | comprising the brain and the spinal cord, responsible for processing sensory information |
| Brain | complex command center of the nervous system, controlling thought, memory, emotion, movement, senses, and all bodily functions, from breathing to heart rate |
| Spinal Cord | part of the central nervous system, a long bundle of nervous tissue extending from the brainstem down your back. movement |
| Peripheral Nervous System | the network of nerves outside the brain and spinal cord |
| Brachial plexus | a complex network of nerves originating from the lower neck (C5-T1 spinal nerves) that controls movement and sensation in the shoulder, arm, forearm, and hand, running from the spine through the armpit to the limb |
| Ulnar nerve | a major nerve from your neck to your hand, controlling hand muscles and providing sensation to the pinky and half ring finger |
| Radial nerve | a major peripheral nerve in the arm, responsible for movement and sensation in the posterior (back) part of the arm, forearm, wrist, and hand, controlling muscles for elbow, wrist, and finger extension |
| Median nerve | a major peripheral nerve running from the arm into the hand, crucial for moving the forearm, wrist, and fingers, and providing sensation to the palm, thumb, index, middle finger, and half the ring finger |
| Sciatic nerve | the body's longest and thickest nerve, running from your lower back down through your hips, buttocks, and legs to your feet, controlling muscles and sensation in the lower limbs |
| Occipital Lobe | the brain's visual processing center, located at the back of the head |
| Cerebellum | brain structure at the back of the head, vital for coordinating voluntary movements, balance, posture, and motor learning |
| Brain Stem | the vital, stalk-like structure connecting the cerebrum to the spinal cord |
| Frontal Lobe | behind the forehead, including areas concerned with behavior, learning, personality, and voluntary movement. |
| Temporal Lobe | a major brain region located behind the temples |
| Parietal Lobe | top-rear of the head, integrating sensory information like touch, pain, temperature, and pressure, and processing spatial awareness, navigation, and complex tasks such as math, reading, and language |
| Wernicke’s Area | a crucial brain region, typically in the left temporal lobe |
| Broca’s Area | brain's left frontal lobe crucial for speech production |
| Sensory Cortex | the brain's processing center for sensory information |
| Motor Cortex | plans, initiates, and controls voluntary movements by sending signals to skeletal muscles, coordinating complex actions, and working with other brain areas like the cerebellum for balance |
| Spinal Cord | a long bundle of nervous tissue extending from the brainstem down your back, protected by your vertebrae, that serves as the main communication highway, transmitting signals between the brain and the body for movement, sensation |
| Gyrus/Gyri | A gyrus (plural: gyri) is a ridge or fold on the surface of the cerebral cortex, surrounded by grooves called sulci, which dramatically increase the brain's surface area, allowing more neurons and cognitive function within the skull |
| Sulcus/Sulci | a groove, furrow, or trench on the surface of the brain's cerebral cortex |
| Brain Stem | the vital, stalk-like structure connecting the cerebrum to the spinal cord |
| Amygdala | a small, almond-shaped structure in the brain's limbic system |
| Hypothalamus | region of the forebrain below the thalamus which coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity |
| Olfactory Bulbs | paired neural structures at the bottom front of the brain, acting as the first relay station for smell, receiving signals from olfactory neurons in the nose and sending processed information to other brain regions for memory and emotion |
| Limbic System | a complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood |
| Hippocampus | The hippocampus is a crucial brain structure in the temporal lobelong-term memories, spatial navigation, and learning |
| Corpus Callosum | C-shaped bundle of nerve fibers (white matter) in the center of the brain that acts as the primary communication highway, connecting the left and right cerebral hemispheres, enabling them to share information and coordinate complex functions like movement |
| Pineal Gland | pea-sized conical mass of tissue behind the third ventricle of the brain, secreting a hormone-like substance |
| Pituitary Gland | pea-sized body attached to the base of the brain, the pituitary is important in controlling growth and development and the functioning of the other endocrine glands. |
| Thalamus | acts as the brain's primary sensory relay station, processing and routing sensory information (sight, sound, touch, taste) to the cerebral cortex |
| Pons | crucial part of the brainstem, acting as a bridge connecting the cerebrum, cerebellum, and spinal cord, relaying motor/sensory info, controlling breathing, sleep cycles |
| Medulla Oblongata | the vital, lower part of the brainstem connecting the brain to the spinal cord, controlling essential involuntary functions like breathing, heart rate, blood pressure, swallowing, and reflexes |
| Midbrain | a small but crucial part of the brainstem connecting the forebrain and hindbrain, vital for motor control (eye, body movement), sensory processing (vision, hearing), relaying information, and controlling wakefulness |