1a Brain Stem and Cranial Nerves Flashcards
What are the three devisions of the brain?
Forebrain - Cerebral hemispheres
Midbrain
Hindbrain - Pons, medulla and cerebellum
What makes up the brainstem?
The midbrain, Pons and medulla
What are the 3 cerebellar peduncles connecting the brainstem to the cerebellum also known as?
white fibre tracts
Which cranial nerve nuclei are found in the brainstem?
3-10 and 12
Which motor pathway has fibres crossing at the medulla?
Corticospinal
Branches of which blood vessel system is most of the cerebral hemispheres supplied by?
Internal Carotid System
Branches of which blood vessel system is most of the brainstem supplied by?
Vertebrobasilar
What are the functions of the General Somatic Afferent Nerves?
To receive stimuli from the periphery eg skin, muscles and joints using receptors such as muscles spindle receptors and golgi tendon receptors
What are the functions of the General Somatic Efferent Nerves?
To innervate skeletal muscle
What are the functions of the General Visceral Efferent Nerves?
To bring about sympathetic or parasympathetic responses - acts on whole organs eg eyes, bladder, liver
What are the functions of the General Visceral Afferent Nerves?
Fibres carry sensation from viscera of head, neck, thorax and abdomen - pain, fullness and blood pressure
What are the functions of the Special Somatic Afferent components?
Fibres carry special senses of hearing and balance
What are the functions of the Special Visceral Afferent components?
Fibres carry taste sensation
What are the functions of the Special Visceral Efferent components?
Innervate skeletal muscles of the jaw, face, larynx and pharynx
Where are the nuclei of the accessory nerve?
Spinal Cord
