Spinal Cord Anatomy Flashcards
T/F: Reflexes only require an afferent neuron or an efferent neuron.
False
________________
Reflexes require both afferent and efferent neurons
_________ area of white matter has the same function as lateral area.
Ventral area of white matter has the same function as lateral area.
__________: enlargement of the spinal cord that includes the lumbar plexus as well as is sensory and motor to the pelvic limb.
Lumbar Intumescence: enlargement of the spinal cord that includes the lumbar plexus as well as is sensory and motor to the pelvic limb.
_________ matter consists of myelinated and unmyelinated axons.
White matter consists of myelinated and unmyelinated axons.
T1 - Cd5 nerves exit the ___________
T1 - Cd5 nerves exit the intervertebral space
T3 to L3 = _______ region
T3 to L3 = lumbosacral region
Sensory information comes from peripheral nerves through ________ of the spinal cord.
Sensory information comes from peripheral nerves through dorsal roots of the spinal cord.
_________ of grey matter consists of motor neurons
Ventral horn of grey matter consists of motor neurons
_________ area of white matter is responsible for position and movement of limbs in space
Dorsal area of white matter is responsible for position and movement of limbs in space
_________ of grey matter is responsible for receiving, processing and relaying afferent information.
Dorsal horn of grey matter is responsible for receiving, processing and relaying afferent information.
Motor information goes to skeletal muscle or smooth muscle through the ________ from the spinal cord.
Motor information goes to skeletal muscle or smooth muscle through the ventral root from the spinal cord.
_________ pathways carry commands from the brain
Descending pathways carry commands from the brain
Funiculi of nerve fibers from ascending and descending motor systems are located in ________ matter
Funiculi of nerve fibers from ascending and descending motor systems are located in white matter
_________ Spinal Cord Segments
36 Spinal Cord Segments
________________
8 Cervical, 13 Thoracic, 7 Lumbar, 3 Sacral and 5 Caudal
Spinal cord segments S1 and S2 are important in regards to the ________ nerve.
Spinal cord segments S1 and S2 are important in regards to the sciatic nerve.
General functions of the spinal cord
Sensory input and motor output
Reflexes
Transmission of information to and from the brain
C2 -C7 nerves are named for the (crainal/caudal) vertebral body.
C2 -C7 nerves are named for the (crainal/caudal) vertebral body.
__________ area of white matter is responsible fore ascending sensory and descending motor pathways
Lateral area of white matter is responsible fore ascending sensory and descending motor pathways
___________ pathways carry sensory information to the brain.
Ascending pathways carry sensory information to the brain.
T1 - Cd5 are named for the (cranial/caudal) vertebral body
T1 - Cd5 are named for the (crainial/caudal) vertebral body
C8 nerve exits the intervertebral foramen between vertebrate __________
C8 nerve exits the intervertebral foramen between vertebrate C7 and T1
__________ of grey matter is a network of interneurons
Intermediate zone of grey matter is a network of interneurons
__________: enlargement of the spinal cord that includes the bracial plexus as well as is sensory and motor to the thoracic limb.
Cervical Intumescence: enlargement of the spinal cord that includes the bracial plexus as well as is sensory and motor to the thoracic limb.
Cervical intumescence is between what spinal cord segments
C6 and T2
Afferent = ________
Afferent = Sensory
___________: neurons originating in the brainstem or spinal cord that synapse onto skeletal muscles
Lower Motor Neurons: neurons originating in the brainstem or spinal cord that synapse onto skeletal muscles
T/F: Peripheral nerve damage can show the same clinical signs as a specific peripheral nerve that is damaged (ie the Femoral Nerve)
True
Lumbar intumescence is located between what spinal cord segments
L4 and S2
Dorsal and ventral roots terminate in _______ matter.
Dorsal and ventral roots terminate in white matter.
C2-C7 nerve exit the ____________
C2-C7 nerve exit the intervertebral foramen
C1 nerve exits the ____________ of the atlas
C1 nerve exits the lateral vertebral foramen of the atlas
Efferent = ________
Efferent = Motor
____________: portion of the spinal cord where spinal cord segments dont line up with vertebral segments
Cauda equina: portion of the spinal cord where spinal cord segments dont line up with vertebral segments
Cauda equina begins at _______ in dogs.
Cauda equina begins at L4 in dogs.
C1 to C5 = _______ region
C1 to C5 = Cranial cervical region
___________ : descending neurons originating from teh cerebral motor cortex or various nuclei of the brainstem.
Upper Motor Neuron : descending neurons originating from teh cerebral motor cortex or various nuclei of the brainstem.
__________ of grey matter contains pre-ganglionic sympathetic neurons and is located only in spinal segments T1 to L3 or L4
Lateral horn of grey matter contains pre-ganglionic sympathetic neurons and is located only in spinal segments T1 to L3 or L4
C6 to T2 = _________ region
C6 to T2 = cervicothoracic region
