The medial longitudinal fasciculus (MLF) is organized as
a pair of white matter fiber tracts that extend through the brainstem
and lie near the midline just ventral to the fourth ventricle (in the medulla and pons) and cerebral aqueduct (in the midbrain).
What is longitudinal fasciculus?
The inferior longitudinal fasciculus (ILF) is
a long-range, associative white matter pathway
that connects the occipital and temporal-occipital areas of the brain to the anterior temporal areas.
What is the MLF in the brain?
The MLF are
a group of fiber tracts located in the paramedian area of the midbrain and pons
. They control horizontal eye movements by interconnecting oculomotor and abducens nuclei in the brain stem. Such small infarcts can easily be overlooked by young neuroradiologists and trainees.
What is MLF in medicine?
The
medial longitudinal fasciculus
(MLF) is a myelinated composite fiber tract found in the brainstem. The MLF primarily serves to coordinate the conjugate movement of the eyes and associated head and neck movements.
What is dorsal longitudinal fasciculus?
The dorsal longitudinal fasciculus (fasciculus of Schutz) is
a periaqueductal ascending and descending fiber system arising from the hypothalamus and terminating to the autonomic nuclei of the pons and the medulla
, conveying autonomic fibers.
What is the purpose of medial longitudinal fasciculus?
The medial longitudinal fasciculus links the three main nerves which control eye movements, i.e. the oculomotor, trochlear and the abducent nerves, as well as the vestibulocochlear nerve. The purpose of the medial longitudinal fasciculus is
to integrate movement of the eyes and head movements
.
What is the function of the longitudinal Fasciculi?
The superior longitudinal fasciculus (SLF) is an extensive white-matter tract that mainly communicates between frontal and parietal lobes, and
provides partial communication with the temporal lobe
. It interconnects nearly all cortical areas of the lateral cerebral hemisphere.
Where does medial longitudinal fasciculus originate?
Inputs. The ascending MLF mainly arises from
the superior and medial vestibular nucleus (VN)
and is involved in the generation of the vestibulo-ocular reflex (VOR).
Does the medial longitudinal fasciculus Decussate?
Descending axons from the medial vestibular nuclei partially
decussate
and continue as the medial vestibulospinal tract at the level of the spinal cord.
What is the function of red nucleus?
The red nucleus is a large structure located centrally within the tegmentum that is involved
in the coordination of sensorimotor information
. Crossed fibres of the superior cerebellar peduncle (the major output system of the cerebellum) surround and partially terminate in the red nucleus.
What does Ino mean in medical terms?
Inhaled nitric oxide
(iNO) is a pulmonary vasodilator, proposed for the treatment of hypoxic respiratory failure associated with persistent pulmonary hypertension.
What is the inferior longitudinal fasciculus?
The inferior longitudinal fasciculus (ILF) is
a white matter tract that connects the occipital and the temporal lobes
. ILF abnormalities have been associated with deficits in visual processing and language comprehension in dementia patients, thus suggesting that its integrity is important for semantic processing.
What is internuclear ophthalmoplegia?
Internuclear ophthalmoparesis (INO), also commonly referred to as internuclear ophthalmoplegia, is
a specific gaze abnormality characterized by impaired horizontal eye movements with weak and slow adduction of the affected eye
, and abduction nystagmus of the contralateral eye.
What is a fasciculus spinal cord?
The dorsolateral fasciculus, first described by Lissauer (1885), is
a small bundle of fibers running longitudinally in the white matter between the dorsolateral edge of the dorsal horn and the surface of the spinal cord
. Small myelinated Ad and C primary afferent fibers enter the dorsolateral fasciculus.
What is medial lemniscus?
The medial lemniscus is
a second-order neuron of the dorsal column-medial lemniscus pathway
(DCML), which, with the somatotopic arrangement, transports the sensory spinothalamic information of conscious proprioception, vibration, fine touch, and 2-point discrimination of skin and joints of the body and head; from the …
How many reticular formations are there in the brain?
The human reticular formation is composed of almost
100 brain
nuclei and contains many projections into the forebrain, brainstem, and cerebellum, among other regions.
