Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
A&P 1
Brain vid 3+ 4 (4.7-4.11)
| Question | Answer |
|---|---|
| what is the medulla composed of | white matter (myelinated axons) |
| what fibers are in the medulla | commissural, association, projection |
| what are commissural fibers and what do they form | axons that link the two hemispheres form the corpus callosum |
| what are association fibers | axons that connect area within a given hemisphere |
| what are projection fibers | ascending sensory and descending motor axons that link the cortex with lower centers of brain (ex. brain stem, spinal cord) |
| what is the basal nucleus | collections of nuclei (grey mater) imbedded in the medulla of each hemisphere |
| what are the functions of basal nuclei | receives sensory input from cortex, sends impulses to premotor cortex to influence skeletal muscle movement, plays a role in behavior and cognition, associated with the substantia nigra in the midbrain and subthalamic nucleus in the diencephalon |
| what does substantia nigra release to basal nuclei to help control movement | dopamine |
| what does death of neuron in the substantia nigra result in | Parkinson's disease |
| what is Parkinson's disease and what are the suspected causes | progressive paralytic disorder caused by viral/environmental/genetic causes |
| what can contribute to Parkinson's disease | synthetic heroin and blows to the head |
| what is the difference between the left and right hemispheres | left: analytical (language functions, communication, numbers, logic) right: artistic (visualization, intuition, emotion, creativity) |
| where are the 2 lateral ventricles found | within each hemisphere |
| where is the 3rd ventricle | in center of diencephalon |
| the 3rd ventricle connect with the lateral ventricles via... | the interventricular foramen |
| where is the 4th ventricle | located in brain stem |
| the 4th ventricle is connected to the 3rd ventricle via... | the cerebral aqueduct |
| true or false: the 4th vernicle is continuous with central canal of spinal cord and subarachnoid space and is filled with cerebrospinal fluid | true |
| what does the diencephalon consist of | thalamus, pineal gland, hypothalamus, pituitary gland |
| what does the thalamus consist of | 2 masses of nuclei (grey atter) joined by a bridge that crosses the 3rd ventricle |
| true or false: the thalamus forms bulk of 3rd ventricle wall and makes up about 80% of the diencephalon | true |
| the thalamus is the gateway to the cortex for... | sensory impulses and motor commands |
| does the thalamus relay impulses for smell | no |
| what are 3 clusters of nuclei in the thalamus | medial geniculate body (impulses to primary auditor cortex), lateral geniculate body (impulses to primary visual cortex), ventral posterior body (impulses to primary gustatory cortex) |
| true or false: basal nuclei and cerebellum relay impulses to motor cortex through the thalamus | true |
| true or false: the thalamus is connected to limbic and prefrontal area where emotions and moods are modified | true |
| what is the pineal gland | size of small pea, attaches to epithalamus and roof of 3rd ventricle |
| what does the pineal gland contribute to | biological clock by releasing melatonin |
| true or false: the pineal gland targets the sleep center in the hypothalamus | true |
| melatonin amount ____ at night, and ____ during the day | rises, falls |
| true or false: when the hypothalamus sends light impulses to the pineal gland, it INHIBITS melatonin production | true |
| what is SAD and when does it occur | seasonal affective disorder, occurs when there's delayed drop in melatonin levels during the day |
| true or false: the hypothalamus consists of about a dozen nuclei (grey matter) | true |
| where is the hypothalamus located | under the thalamus and forms floor of 3rd ventricle |
| what does the hypothalamus receive | all sensory data |
| where does the cell bodies of the hypothalamus extend their axons to | brain stem + spinal cord, posterior pituitary gland (where they control release of 2 hormones) |
| what is hypothalamus a major regulator of | homeostasis |
| what is the abbreviation for the functions of the hypothalamus | SWEET HAT |
| what does SWEET HAT stand for (functions of hypothalamus) | sleeping, water, eating, emotions, temperature, hormones, ANS, thirst |
| true or false: the hypothalamus is associated with rage and aggression | true |
| what is the pituitary gland and where is it found | master endocrine gland, attached to hypothalamus by the infundibulum |
| what does the anterior pituitary produce and store | 6 hormones |
| what extend from hypothalamus into the posterior pituitary | neurosecretory cells |
| what do neurosecretory cells produce | 2 different hormones within cell bodies that are packaged in vesicles and transported to terminal knobs within posterior pituitary |
Created by:
katiew0