Which spinal segment contains the axons of motor neurons?
Where does the coccyx extend?
Which matter contains many myelinated and unmyelinated axons organized in tracts or?
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What is the filum terminale?
The filum terminale (FT) is a fibrous band that extends from the conus medullaris to the periosteum of the coccyx, and its functions are to fixate, stabilize, and buffer the distal spinal cord from normal and abnormal cephalic and caudal traction.
Which accurately describes the filum terminale?
Which accurately describes the filum terminale? It is a membrane that protects the spinal cord.
What is the function of the filum terminale quizlet?
What is the function of the Filum Terminale? It helps anchor the conus medullaris to the coccyx.
What is the filum terminale made of quizlet?
Filum terminale: An extension of Pia mater, arises from conus medularis. It extends inferiorly and anchors the spinal cord to the coccyx. Conus Medullaris: Where spinal cord tapers to a conical portion.
How to identify filum terminale?
The filum is differentiated from nerve roots by presence of characteristic squiggly vessel on surface of filum. Also, under the microscope, the filum has a distinctively whiter appearance than the nerve roots, and ligamentous-like strands can be seen running through it.
What is the filum terminale made of?
The filum terminale is the nonfunctional continuation of the end of the spinal cord. It usually consists of fibrous tissue without functional nervous tissue.
Does the filum terminale anchor the spinal cord?
The spinal cord is anchored distally by the filum terminale, a fibrous extension of the pia mater anchoring the spinal cord to the coccyx. [1] Protecting the spinal cord is the surrounding cerebrospinal fluid (CSF), supportive soft tissue membranes and meninges, and the osseous vertebral column.
Where does the filum terminale attach inferiorly and what its function?
The lower part, or filum terminale externum, closely adheres to the dura mater. It extends downward from the apex of the tubular sheath and is attached to the back of the first segment of the coccyx in a structure sometimes referred to as the coccygeal ligament....Filum terminaleFMA83977Anatomical terminology5 more rows
What does the filum terminale tether?
The filum terminale is a strand of tissue that bridges the spinal cord tip and the tailbone (sacrum). The inelastic structures in children originated from defective closure of the neural tube (the precursor of the spinal cord) during embryonic development, eventually forming a condition known as spina bifida.
Where is the filum terminale located?
an extension of the pia mater that extends from the terminal end of the spinal cord to the tailbone.
Is filum terminale a ligament?
Caudal to the end of the dural sac is a specialization of meninges called the coccygeal ligament (or filum terminale externum) that attaches the meninges, and consequently the spinal cord, to the coccyx.
What is the anatomical relationship between the filum terminale and the conus medullaris?
The conus medullaris is tethered to the coccyx by a fibrous cord called the filum terminale, which stabilizes the distal end of the spinal cord.
What does the filum terminale tether?
The filum terminale is a strand of tissue that bridges the spinal cord tip and the tailbone (sacrum). The inelastic structures in children originated from defective closure of the neural tube (the precursor of the spinal cord) during embryonic development, eventually forming a condition known as spina bifida.
Does the filum terminale anchor the spinal cord?
The spinal cord is anchored distally by the filum terminale, a fibrous extension of the pia mater anchoring the spinal cord to the coccyx. [1] Protecting the spinal cord is the surrounding cerebrospinal fluid (CSF), supportive soft tissue membranes and meninges, and the osseous vertebral column.
Where does the filum terminale attach inferiorly and what its function?
The lower part, or filum terminale externum, closely adheres to the dura mater. It extends downward from the apex of the tubular sheath and is attached to the back of the first segment of the coccyx in a structure sometimes referred to as the coccygeal ligament....Filum terminaleFMA83977Anatomical terminology5 more rows
What is the best description of the epidural space?
The epidural space is the area between the dura mater (a membrane) and the vertebral wall, containing fat and small blood vessels. The space is located just outside the dural sac which surrounds the nerve roots and is filled with cerebrospinal fluid.
What is the filum terminale?
Background: The filum terminale is a fibrous band, consisting of the filum terminale internum (FTI), connect ing the conus medullaris (CM) with the dural sac (DS), and the filum terminale externum (FTE ), connecting the DS with the coccyx.
Is the CM strain increased when the dentate ligaments are cut?
The CM strain is increased when the dentate ligaments are cut. Conclusions: The FTI is an overturned oblate cone-shaped structure, showing bigger strain under weight loading compared with the CM, thereby protecting the CM from traction, together with the dentate ligaments.
How many nerve pairs are there in the cervical area?
In the cervical area, there are eight nerve pairs, with the first exiting above C1.
Which is more complex, the brachial plexus or the cervical plexus?
The brachial plexus is more complex than the cervical plexus. How is the brachial plexus organized from the spinal nerve to the periphery?
Why is none of the meninges punctured?
None of the meninges is punctured, because the injection is in the epidural space.
Which nerve receives motor information from a specific segment of the skin and muscles of the neck and back?
The ventral ramus of each spinal nerve receives motor information from a specific segment of the skin and muscles of the neck and back.
What does it mean when a college freshman is admitted to a hospital?
A college freshman admitted at a hospital presents with a high fever, severe headache, a stiff neck, nausea, and confusion. The attending resident suspects a case of spinal meningitis, an inflammation of the CNS membranes (meninges) surrounding the brain and spinal cord, usually due to the spread of an infection.
Which part of the body is affected by cervical enlargement?
The cervical enlargement supplies nerves to the pectoral girdle and upper limbs.
What is the filum terminale?
The filum terminale ("terminal thread") is a delicate strand of fibrous tissue, about 20 cm in length, proceeding downward from the apex of the conus medullaris. It is one of the modifications of pia mater. It gives longitudinal support to the spinal cord and consists of two parts: 1 The upper part, or filum terminale internum, is about 15 cm long and reaches as far as the lower border of the second sacral vertebra. It is continuous above with the pia mater and contained within a tubular sheath of the dura mater. In addition, it is surrounded by the nerves forming the cauda equina, from which it can be easily recognized by its bluish-white color. 2 The lower part, or filum terminale externum, closely adheres to the dura mater. It extends downward from the apex of the tubular sheath and is attached to the back of the first segment of the coccyx in a structure sometimes referred to as the coccygeal ligament.
How long is the filum terminale internum?
The upper part, or filum terminale internum, is about 15 cm long and reaches as far as the lower border of the second sacral vertebra. It is continuous above with the pia mater and contained within a tubular sheath of the dura mater.
Which nerve leaves the spinal cord?
The most inferior of the spinal nerves, the coccygeal nerve leaves the spinal cord at the level of the conus medullaris via respective vertebrae through their intervertebral foramina, superior to the filum terminale.
Where is the lower part of the coccyx?
The lower part, or filum terminale externum, closely adheres to the dura mater. It extends downward from the apex of the tubular sheath and is attached to the back of the first segment of the coccyx in a structure sometimes referred to as the coccygeal ligament.
Which tissue contains the cell bodies of sensory neurons whose axons carry information to the spinal cord?
It is neural tissue that contains the cell bodies of sensory neurons whose axons carry information to the spinal cord.
Which tissue contains large numbers of myelinated and unmyelinated axons?
It is neural tissue that contains large numbers of myelinated and unmyelinated axons.
What is the difference between a white and gray ramus?
The white ramus has only motor fibers, while the gray ramus has both motor and sensory fibers.
How long is the cord?
The cord itself is as long as the vertebral column.
Which tissue is dominated by the cell bodies of neurons, neuroglia, and unmyelinated a?
It is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmyelinated axons, and it surrounds the narrow central canal.
What is the outer, tough meninx around the brain?
The outer, tough meninx around the brain is the dura mater.
What is the outer 2 mm of white matter of the cerebrum?
The cerebral cortex is the outer 2 mm of white matter of the cerebrum.
What are the parts of the diencephalon?
The diencephalon consists of the midbrain, pons, and medulla oblongata.
Which hemispheres are connected by corpus callosum?
The corpus callosum is a large tract of white matter that connects the right and left cerebral hemispheres.
Which lobe is involved in voluntary movements?
The primary motor area in the temporal lobe is involved in the initiation of voluntary movements.
Which hemisphere receives sensory output from the right side of the body?
The right cerebral hemisphere receives sensory output from the right side of the body.
Which spinal segment contains the axons of motor neurons?
the dorsal roots associated with the spinal segments contain the axons of motor neurons.
Where does the coccyx extend?
It extends from the conus medullaris along the length of the vertebral canal as far as the dorsum of the coccyx.
Which matter contains many myelinated and unmyelinated axons organized in tracts or?
the gray matter contains many mye linated and unmyelinated axons organized in tracts or columns.
