INTRODUCTION AND ORGANIZATION OF THE NERVOUS SYSTEM Flashcards
- Brain
- Spinal Cord
Central Nervous System
- Cerebral Cortex
- Diencephalon (–alamus)
Forebrain
major sensory relay region going to and from the cortex (thalamocortical projection)
Thalamus
basically govern all functions (thermo, tempt, emotions, etc.) – can be under autonomic and CNS
Hypothalamus
for muscle contraction; initiation and control of movements
Subthalamus
contains the pineal gland and is responsible for sleep-wake cycle.
Epithalamus
- Superior colliculi
- Inferior colliculi
Midbrain
- 12 Cranial Nerves
- Peripheral Nerve
Peripheral Nerve System
- Cerebellum (little brain)
- Pons (respiration etc.)
- Medulla oblongata
Hindbrain
midbrain, pons, medulla
Brainstem
Cranial Nerve V
Trigeminal (BOTH)
Cranial Nerve II
Optic (S)
Cranial Nerve I
Olfactory (S)
Cranial Nerve VI
Abducens (M)
Cranial Nerve IV
Trochlear (M)
Cranial Nerve IX
Glossopharyngeal (BOTH)
Cranial Nerve III
Oculomotor (M)
Cranial Nerve VII
Facial (BOTH)
Cranial Nerve VIII
Vestibulocochlear (S)
Cranial Nerve XII
Hypoglossal (M)
Constriction of pupils
Levator Palpebrae Superioris - Opening of eyes
III - Oculomotor
Innervates Lateral Rectus
VI - Abducens
Parasympathetic in Nature
Cranial Nerves X, IX, VII, III
Cranial Nerve X
Vagus (BOTH)
Cranial Nerve XI
Spinal Accessory (M)
- Blinking reflex (cornea) ophthalmic division
- Sensations or pain in the face, gums, tongue
- Motor (MITE)
1. Masseter
2. Internal pterygoid
3. TEmporalis
V - Trigeminal
Innervates Superior Oblique
IV - Trochlear
Innervates for the taste of the anterior ⅔ of the tongue
Muscles of facial expression
Innervates orbicularis oculi for eyes closing
VII - Facial
For posterior ⅓ of the tongue
Gag reflex
Important for patients with dysphagia or choking
For swallowing with cranial nerve X
IX - Glossopharyngeal
Balance and hearing
VIII - Vestibulocochlear
Phonation
During ‘ah’ sound, when the uvula deviates to the other side, it could mean that the other side is weak
X - Vagus
Innervates upper traps and sternocleidomastoid
XI - Spinal Accessory
Movement of the tongue, weakness on the side of deviation.
XII - Hypoglossal
Sendory input, reflex circuits, somatic and autonomic motor output
Dorsal/Ventral Roots
Cardiovascular and respiratory control, auditory and vestibular input, brainstem reflexes
Cranial Nerves VII-XII
Respiratory/uriniray control, control of eye movemeny, facial sensation/motor control
Cranial Nerves V-VIII
Motor coordination, motor learning, equilibrium
Cranial Nerve VIII
Acoustic relay and mapping, control og the eye (including movement, lens and pupillary reflexes), pain modulation
Cranial Nerves III-IV
Sensory and motor relay to the cerebral cortex, regulation of coritcal activation, visual input
Cranial Nerve II
Autonomic and endocrine control, motivated behavior
Hypothalamus
Shape patterns of thalmocortical motor inhibition
Inhibits the thalamus from continuously facilitating the cortex to avoid excessive movements (parkinson’s = tremors)
Thalamocortical reflex
Basal Ganglia
Sensory perception, cognition, learning and memory, motor planning and voluntary movement, language
Cranial Nereve I
Visual reflexes
Superior colliculus
Auditory reflexes
Inferior colliculus
Meninges
Dura mater
Subdural space
Arachnoid mater
Subarachnoid space
Pia mater
Outermost Meningi
Duramater
Innermost Meningi
Pia mater
Meningi space that contains the CSF
Subarachnoid space
Lies in the cranial cavity
Continuous with the spinal cord through the foramen magnum
Surrounded by the three meninges
Surrounded by the CSF
Brain
Cerebral cortex
Composed of multiple gyrus/folds and sulcus/fissures
Forebrain
Layer of neuronal cell bodies that covers the entire surface of the hemisphere
Cerebral cortex
states that the Anterior spinal roots transmit motor impulses and the Posterior roots sensory impulses
Bell-Magendie Law
Largest part – Consists of two cerebral hemisphere, which are connected by a mass of white matter called corpus callosum
Cerebrum
Clef that seperates the hemispheres
Longitudinal fissure
Surface layer of each hemisphere, is composed of gray matter
Cortex
named from the bones of cranium under which they lie
Lobes
central core of white matter which contains masses of gray matter
Basal ganglia
fan-shaped collection of nerve fibers
Corona radiata
tailed nucleus situated on the medial side of the internal capsule
Caudate nucleus
lens shaped nucleus of the lateral side of the internal capsule
Lentiform nucleus