Anatomy Exam 4 Flashcards
What term references the opposite side?
The same side?
Contralateral
Same side anterolateral
How many spinal nerves are there?
cranial nerves?
31 pairs of spinal nerves
8 cranial nerves
What is a dermatome
Peripheral map of your body’s nervous system
What useful aspects of neural control are demonstrated by a homunculus
Graph that shows which parts of the body are most represented by nerves
What factor determines if a synaptic event is excitatory or inhibitory
Which neurotransmitter we use
What enzyme is responsible for creation of resting membrane potential what is the value of resting membrane potential?
Sodium potassium exchanger gets rid of charges to make neuron negative -70
- What important limitations to action potential propagation does the absolute refractory period create?
It limits propagation to one direction (goes down axon)
19 Name the three layers of the meninges (where is spinal fluid?)
Durra- outer thickest
Arachnoid
Pia- Finest
20 What prevents the spinal cord from moving within the vertebral foreman
Anchored by denticulate ligaments anchored by coccyx
21 What type of neurons are found in the ventral grey matter of the spinal cord?
What about dorsal?
Ventral (down)- Motor
Dorsal (Up)- Sensory
Where are the Conus medularis and Filum terminale
Lumbar bone 1
What is the clinical advantage of having a spinal cord shorter than the Vertebral Column?
Spinal fluid can enter without harming vertebral column
- What happens at the Pyramidal Section (Transition between Medulla and spinal cord?
Left motor cortex Fibers crossover to the right side of the spine and Right motor cortex fibers crossover to the left
23 What Fibrous Connective tissue covers
- A nerve
- A nerve Fasical
- An entire peripheral nerve
- Endonerium
- Perinuerium
- Epinerium
What is the name of the peripheral “map” of innervation?
Dermitome
