Nervous System 2

Front 1

Describe somatic senses?

Back 1

(input from skin and musculoskeletal system)

Front 2

Describe visceral senses?

Back 2

Input from internal organs.

Front 3

Describe sensation?

Back 3

conscious or subconscious awareness

Front 4

Describe perception?

Back 4

awareness plus interpretation of sensory information

Front 5

Describe the process of a sensation?

Back 5

A sensory receptor is stimulated

The sensory receptor transduces the sensory stimulus – creating a graded potential in response to a specific type of stimuli

The sensory neuron creates one or more nerve impulses which travel toward the CNS

Integration of the sensory input occurs in specific regions of the CNS

Front 6

How do we classify sensory receptors?

Back 6

By location and type of stimulus.

Front 7

What are the four types of somatic sensors?

Back 7

Tactile sensations
Thermal sensations
Pain
Proprioception

Front 8

Sensory receptors in the skin include?

Back 8

Corpuscles of touch (also called Meissner corpuscles)
Hair root plexuses
Mechanoreceptors
Merkel discs
Ruffini corpuscles
Lamellated corpuscles also called (Pacinian corpuscles)
Free nerve endings

Front 9

What are pain receptors?

Back 9

Nocireceptors.

Front 10

Proprioceptive sensations allow us to do what?

Back 10

awareness of where our head and limbs are, and where they are going; these sensations are critical for the precise control of body movements

Front 11

Describe the first, second, and third order neurons from the somato- sensory pathways.

Back 11

First-order neurons carry signals as far as the spinal cord or brainstem
Second-order neurons carry signals on to the thalamus
Third-order neurons travel from the thalamus to the cerebral cortex

Front 12

The cerebellum helps us maintain what as well as?

Back 12

helps us maintain posture and balance, as well as learn complex motor skills

Front 13

What are the four steps of cerebral activity?

Back 13

Monitors intentions for movement
Monitors actual movement
Compares command signals with sensory information
Sends out corrective feedback

Front 14

Describe immediate, short term, and long term memory?

Back 14

Immediate memory gives us knowledge of our current surroundings (duration: one to a few seconds)

Short-term memory allows immediate recall of information (duration: seconds to minutes)

Long-term memory allow retrieval of much older information (duration: days to years)