Nervous System 2 Flashcards
Where does the spinal cord end?
Between L6 &L7 vertebra
Conus Medullaris
Tapered end of the spinal cord
Lateral Horn
Gray matter found in segments T1-L2
Cell bodies for sympathetic nervous system
White matter(spinal cord)
Surrounds grey matter
Myelinated axons carrying impulses to and from the brain
Dorsal root
Afferent(brings in)
Meets ventral to form spinal nerve
Ventral root
Efferent(bring out)
Meets with dorsal to make spinal nerve
Spinal nerves
Exit between vertebra
Only one nerve can exit between two vertebra
Cauda Equina
Nerves travel causally in the vertebral canal after spinal cord ends
Peripheral nervous system
Cranial nerves(12)
Spinal nerves
Cranial Nerves
OOOTTAFVGVAH
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory
Hypoglossal
Spinal Nerves
Phrenic
Brachial plexus
Lumbosacral plexus
Phrenic Nerve
Cervical spinal nerves 5&6 unite
Brachial Plexus
Nerves C6-C8 & T1
Network produces nerves that innervate the forelimb
Forelimb nerves
Ulnar
Median
Radial
Musculocutaneous
Lumbosacral Plexus
L4-L7 lumbar
S1-S3 sacral
Femoral and sciatic nerves
Olfactory
1
Sensory
Sense of smell
Receptors in nasal passages
Optic
2
Sensory
Vision
Receptors in retina of eye
Oculomotor
3
Motor
Move eye
ANS-control pupil
Trochlear
4
Motor
Move eye
Trigeminal
5
Sensory&motor
Sensory to face and teeth
Motor to muscles of mastication
Abducens
6
Motor
Move eye
Facial
7
Sensory & motor
Sensory to taste
Motor to facial muscles
ANS-tears, salivation
Vestibulocochlear
8
Sensory
Balance
Hearing
Glossopharyngeal
9
Sensory & motor
Sensory to taste
Motor to tongue
ANS- salivation
Vagus
10
Sensory & motor
Sensory from gastro tract
Motor to larynx and pharynx
ANS-parasympathetic-motor thorax and abdomen
Accessory
11
Motor
Head, neck and shoulder
Hypoglossal
12
Motor
Motor to tongue
