PSYC234 Study Guide - Final Guide: Cerebral Cortex, Paraplegia, Cerebellum
Sensorimotor Systems
-Sensorimotor system = sensory input guiding motor input!
-All movement depends on muscle contractions!
ā¢3 types are smooth, skeletal and cardiac!
ā¢Each muscle is composed of ļ¬bres ā> each ļ¬bre receives input from only 1 axon
but an axon can innervate more than 1 ļ¬bre!
-Smooth muscle!
ā¢Cells do not have striations!
ā¢Control digestive system and other organs!
ā¢Consists of long thin cells ā> spindle shaped!
ā¢Most smooth muscle is a single until ā> eyes have!
-Skeletal muscle!
ā¢Facilitates movement of body!
ā¢Started muscle tissue under voluntary control of somatic nervous system!
ā¢Most attached to bones by bundles of collagen ļ¬bres known as tendons ā> tendons
connect bone to muscle while ligaments connect bone to bone!
-There are two types of skeletal musclesā¦!
ā¢Slow twitch muscle ļ¬bres (aerobic) which are good for endurance!
ā¢Fast twitch muscle ļ¬bres (anaerobic) which are good for rapid movements!
-Cardiac muscle!
ā¢Involuntary, strained muscle that is found in walls of heart!
ā¢Cardiac muscle highly resistant to fatigue!
-Neuromuscular junction!
ā¢Synapse between a motor axon and a muscle ļ¬bre!
-Muscle proprioceptors!
ā¢Detect the stretch and tension of a muscle!
ā¢Sensitive to both tension and pressure!
ā¢Can be both conscious and unconscious!
ā¢Muscle spindle ā> stretch receptors with body of a muscle that detect as in length
of muscle!
Document Summary
All movement depends on muscle contractions: 3 types are smooth, skeletal and cardiac, each muscle is composed of bres > each bre receives input from only 1 axon but an axon can innervate more than 1 bre. Smooth muscle: cells do not have striations, control digestive system and other organs, consists of long thin cells > spindle shaped, most smooth muscle is a single until > eyes have. There are two types of skeletal muscles : slow twitch muscle bres (aerobic) which are good for endurance, fast twitch muscle bres (anaerobic) which are good for rapid movements. Cardiac muscle: involuntary, strained muscle that is found in walls of heart, cardiac muscle highly resistant to fatigue. Neuromuscular junction: synapse between a motor axon and a muscle bre. Types of movements: voluntary, involuntary (re exes, ballistic > once initiated they cannot be altered (not subject to feedback correction) such as throwing a punch.
