6465644
Description
Flashcards by Madeline Luedke, updated more than 1 year ago
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Created by Madeline Luedke
almost 8 years ago
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| Question | Answer |
| Lobes | Systems of organized neurons devoted to a specific function |
| Nerves | bundles of axons making a pathway |
| 2 divisions of peripheral nervous system (PNS) | 1. somatic nervous system 2. autonomic nervous sytem |
| Somatic Branch of PNS | • voluntary muslces • brings sensations in to CNS (sensory afferents) • send movements out of CNS (motor efferents) • via spinal and cranial nerves |
| dermatome | area of body innervated by the dorsal roots of a given segment of spinal cord |
| Autonomic Branch of PNS | • internal regulation • body temp, digestion, heart, glands Branches: 1. sympathetic: fight or flight 2. parasympathetic: calm, homeostasis |
| Parasympathetic Branch of ANS of PNS | • release acetycholine before/after ganglia • long distance on first road |
| Sympathetic Branch of ANS of PNS | • acetycholine/norepinephrine • short first road |
| The 6 Regions of the Brain | 1. Tel encephalon 2. Di encephalon 3. Mes encephalon 4. Met encephalon 5. Mye el encephalon 6. Spinal Cord |
| Spinal Cord | • Looks like H • inner H: cell bodies • outer H: myelinated axons • afferent sensations in through dorsal • efferent motor signals out through ventral |
| My el encephalon (medulla) | • on and off ramps • area postrema • reticular formation starts here |
| Reticular formation | activating arousal system in brain |
| Met encephalon | • Cerebellum: mini brain on dorsal surface • coordination of fine-tuning movements • pons: translator & fine-tuner on ventral • primitive parts of brain |
| Mes encephalon | 1. tectum (dorsal) • inferior colliculi (hearing) • superior colliculi (sight) 2. Tegmentum • periaqueductal gray: pain killers stop the signal hear form traveling down spinal cord|opiate analgesia • substantia nigra: affects movement| parkinsons • ventral tegmentum: affects stuff coming in and going up |addiction, parkinsons, schizophrenia |
| Di encephalon | 1. Thalmus: sensory gatekeeper • tollbooth between lower/upper brain 2. Hypothalmus: maintains body's internal states |
| Tel encephalon | • large & complex • convolutions: wrinkled pieces for surface area (big creases: fissures, small: sulci, ridges: gyri) • 90% is neocortex with 6 layers |
| Occipital Lobe | • back of brain • vision |
| Temporal | • sounds • speech (left side only) • biggest asymmetry of brain |
| Parietal Lobe | • Links different sensations • The inbox (primary sensory cortex) |
| Frontal Lobe | • Executive Functions |
| Limbic System | Regulation of motivated behaviors (four Fs) •hippocampus: memory index • amygdala: adds emotion to memories |
| Longitudinal Fissure | • divides right/left halves • inside is corpus callosum |
| Central Fissure | Frontal/parietal |
| Lateral Fissure | Frontal/Temporal |
| Basal Ganglia | • Motor system • Substantia Nigra-Striatum: pathway related to parkinsons • Nuccleus Accumbens: reward effects on drugs |
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