What is the MLF pathway?
What is the MLF pathway?
The medial longitudinal fasciculus connects the interneurons of the abducens nucleus with the motoneurons of the contralateral oculomotor nucleus and yokes the two eyes together. This provides a final common pathway for the generation of horizontal visually guided saccadic eye movements.
What does the MLF do?
The MLF is a fiber tract located directly ventrolateral to the oculomotor nucleus that interconnects the oculomotor nucleus, trochlear nucleus, and abducens nucleus (Figure 1). The MLF serves to facilitate yoked eye movements (i.e., simultaneous abduction of the right eye and adduction of the left or vice versa).
Where does the MLF cross?
The medial longitudinal fasciculus (MLF) is an area of crossed over tracts, on each side of the brainstem. These bundles of axons are situated near the midline of the brainstem….
| Medial longitudinal fasciculus | |
|---|---|
| FMA | 83846 |
| Anatomical terms of neuroanatomy |
Where 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.
What are the medial longitudinal fasciculus?
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 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.
Where does the medial longitudinal fasciculus originate?
Containing both ascending and descending fiber tracts, the MLF is found on each side of the brainstem near the midline, ventral to the periaqueductal grey matter, and ascends to the interstitial nucleus (of Cajal) 1.
What is the dorsal longitudinal fasciculus?
What is lateral longitudinal fasciculus?
Definition: The lateral longitudinal fascicule is an ascending bundle of axons. The LLF contains fibers of the auditory and mechanosensory systems which originate in the primary sensory brainstem nuclei and terminate in the torus semicircularis.
What is the inferior 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 superior longitudinal fasciculus?
The superior longitudinal fasciculus (SLF) is a large bundle of association fibers in the white matter of each cerebral hemisphere connecting the parietal, occipital and temporal lobes with ipsilateral frontal cortices (Schmahmann et al. 2008).
What is the inferior fronto occipital fasciculus?
The inferior fronto-occipital fasciculus (IFOF) is a large white matter tract of the human cerebrum with functional connectivity associated with semantic language processing and goal-oriented behavior.
What is the function of arcuate fasciculus?
The arcuate fasciculus is a bundle of axons that connects the temporal cortex and inferior parietal cortex to locations in the frontal lobe. One of the key roles of the arcuate fasciculus is connecting Broca’s and Wernicke’s areas, which are involved in producing and understanding language.
What is inferior longitudinal fasciculus?
What happens if arcuate fasciculus is damaged?
The arcuate fasciculus connects these two regions. The classical explanation for conduction aphasia is that damage to the arcuate fasciculus impairs the transmission of information between the Wernicke area and the Broca area. This injury leads to impaired repetition.
Which two regions are connected by the inferior longitudinal fasciculus?
Where is arcuate fasciculus located?
The arcuate fasciculus (AF) is a white matter bundle that connects the frontal and temporal lobes within each cerebral hemisphere by passing dorsally beneath the parietal lobe.
What does the arcuate fasciculus do when a person is asked to repeat a word?
Causes of Conduction Aphasia Broca’s area is responsible for producing speech, while Wernicke’s is responsible for processing speech spoken by others. Damage to the arcuate fasciculus produces a separation between those two areas. This may explain why it causes the person to have difficulty repeating phrases.
