Help
Options
Question
brain stem
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
Where are the nuclei of cranial nerves located?
Remaining cards (22)
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
UB ANA 113 Lec 17
Brain II
| Question | Answer |
|---|---|
| brain stem | core of brain. Connect hemispheres and spinal cord. |
| Where are the nuclei of cranial nerves located? | brain stem |
| Medulla oblongata | L - Foramen magnum. F - Cardiovascular and respiratory centers. Motor and sensory crossover (decussation) |
| Pons | L - superior to medulla. F - Respiratory center |
| Midbrain | L - superior fo pons. F - auditory and visual reflex centers |
| Diencephalon | thalamaus and hypothalamus |
| Thalamus | superior to midbrain. Beneath corpus collosum. Analyze and relay info to cerebral hemisphere (except smell) |
| hypothalamus | Inferior to thalamus but superior to midbrain. Nuclei control sleep/wake cycle, eating(anorexia), ANS connections with pituitary. "flight, fight, feed, fornicate" |
| Reticular activating system (center) | Neurons in middle of brain stem (thalamus to medulla). Maintains conscious state. Damaged = coma |
| Cerebellum | coordinates movement.. "little brain" |
| basal ganglia | clusters of neurons in the brain. Initiates movement - Adult. Controls movement of newborns. Ex area takes a year to mature = walking |
| Substantia Nigra | pigment in these neurons. Gross movement, nothing fine. Damaged = parkinson's diseae |
| Limbic system | Many parts of brain form. Sex drive, memory. Alzheimer's disease. |
| Tracts/Pathways | bundles of nerves conduct info to brain and spinal cord. |
| Fasciculus gracilis and cuneatus | sensory pathway. Origin-Spinal cord, Decussation- Medulla, Destination - (3,1,2) |
| Corticospinal tract | Motor Pathway. Origin (Area 4). Decussation - medulla,Destination - spinal cord.... goes cortex t spinal cord without synapsing |
| Impaired motor function | Damage to either upper motor neuron(cell body in gray matter of cortex, synapse on lower neuron) or lower motor neuron (cell body in brainstem/spinal cordm "synapse" of skeletal muscle fibers) |
| Poliomyelitis | lower-motor neuron leision. Damage to lower motor neurons in ventral gray horn. Usually occurs in lumbar enlargement. Affect lower limb |
| Lower motor neuron leision symptoms | Flaccid paralysis, reflexes absent, muscle atrophy. Muscles supporting vertebral column causes a limp |
| Cerebrovascular Accident (CVA) | Stroke. Upper motor neuron leision. Blockage/rupture causes inadequate blood flow (ischemia)... neurons die |
| Upper motor neuron leision symptoms | spastic paralysis. Reflexes intact. Babinski response, toes flare out, big toe up |
| Damage to branches of right middle cerebral artery which supplies precentral gyrus | affect upper limb |
| damage to branches of left anterior cerebral artery which supply postcentral gyrus | affect lower limb |
Created by:
HugsAndKisses
Popular Anatomy sets