13247617
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
over 6 years ago
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| Question | Answer |
| What is the neural tube | tube w/ lumen and neuroblast-containing walls |
| What develops within the neural tube? | Entire CNS |
| Structure of brain | Three 1' vesicles Fore/mid/hindbrain Divide into five 2' vesicles |
| Ventricles are | regions containing CSF |
| Lower vertebrae brains have (3) | large area devoted to olfaction ^ Size of diencephalon ^ size of cerebrum |
| Mammalian brains have (4) | Folding of cortex Development of 6 layered neocortex Enlargement of cerebellum Reduction of the olfactory system |
| Human brain has (3) | 1' visual sensory cortex somatic sensory cortex Enlargement of cortical areas w/ unique human features |
| Where do cranial nerves emerge from | Brainstem |
| what is white matter | myelinated axons |
| corpus callosum is __ that ___ | WM Connects hemispheres of the brain |
| Internal capsule contains | many tracts |
| What are tracts? | Bundles of myeliniated axons connecting nuclei (WM) |
| Example | Corticospinal tract = starts in cortex down to spine |
| fascicles means | bundles |
| Cortex is made out of | Gray matter |
| Gray matter is comprised of | Neuron Cell bodies organised into nuclei or laminae (layers of cortex) |
| name of cell bodies outside of brain | ganglia |
| Diagram of the brain (5) | Cerebellum midbrain thalamus cortex cc |
| How is swimming co-ordinated in fish? | CPG on each side of each spinal cord segment Each half of spinal cord co-ordinates L and R side |
| What controls the CPG? | Locomotor command centres in brainstem |
| What controls brainstem LCC? | Basal ganglia in cerebral hemisphere |
| Which cell types are key neurons in startle response? | M-neurons |
| How dey do dat? | Most fish have large M-neuron either side of brainstem Vibrations detected via sensory input from lat. lines (viii) Axon crosses midline, extends throughout spinal cord Collaterals contact inter/motorneurons at every spinal level Unilateral muscle contraction Also inhibits other side of spinal cord by releasing exc. neurot onto inhib neuron |
| Vestibulocerebrum involved in | balance |
| spinocerebrum development when | body raised off ground |
| neocerebrum is | connected to cerebral cortex for motor co-ordination |
| MOA spinal reflex | Sensory neuron brings info into spinal cord via dorsal root ganglion Synapse in dorsal horn (GM) Interneuron synapse to motor neurons in ventral horn Release neurot onto skeletal muscle |
| Supra-spinal control ascending | Sensory run from spinal cord to sensory cortex in cerebral hemisphere |
| Descending | Motor Exert control over motor neurons in spinal cord |
| 3 major mammalian pathways | Corticostriate pathway (basal ganglia) Cortico-cerebellar pathway Corticospinal tract |
| What influences reptiles/amphibians? | Cerebral cortex + spinal cord Evolving basal ganglia, the cortex, the brainstem Cerebellum and spinal cord |
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