A reflex is a precise response made by certain body parts in response to a triggered stimulus. The reflex arises from the spinal chord and passes through the reflex arc. Most actions of reflexes are generalized and widely spread.
Detail description of the context is treated in this book.
The Sense organ II (Physiology of the eye)
Higher intellectual functions 1
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DON BARRY
WEK FIVE
REFLX, VOLUNTARY ACTIONS AND CONDITAL REFLXS
CONTE
a) Reflx and voluntary actions
b) The reflx arc
c) Diferncs betwn reflx and voluntary actions
d) Condite reflxs
e) Diferncs betwn hormnal and nervous cordinat
REFLX AND VOLUNTARY ACTIONS
Actions are respon to stimul. Thes actions are grouped into two: involutary (reflx) and voluntary actions.
REFLX ACTIONS
Reflx actions are automic respon to stimul whic do not invole the consiu or higer centr of the brain. Thes actions are mainly proteciv, guardin us from dangerous stimul and helping us to maint posture and balnce. Reflx actions include jerking of the legs, blinkg of the eys etc.
THE REFLX ARC
The reflx arc involes the folwing:
a. The senory recptos tha reciv the stimul.
b. The senory neuros along whic the senory impulse travels
c. The relay or intermda neuro throug whic the senory impulse is pased on.
d. The motr (efrnt) neuros along whic the respon is transmied.
e. The efctors (muscle and glands) whic the motr impulse trige to bring about an aproite respon.
Reflx actions can be:
1. Spinal reflx involg the spinal cord e.g kne jerk
2. Cranil reflx involg the brain e.g closing of puil in the presnc of bright light.
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