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Items: 14

1.

Trans-Splicing

The joining of RNA from two different genes. One type of trans-splicing is the "spliced leader" type (primarily found in protozoans such as trypanosomes and in lower invertebrates such as nematodes) which results in the addition of a capped, noncoding, spliced leader sequence to the 5' end of mRNAs. Another type of trans-splicing is the "discontinuous group II introns" type (found in plant/algal chloroplasts and plant mitochondria) which results in the joining of two independently transcribed coding sequences. Both are mechanistically similar to conventional nuclear pre-mRNA cis-splicing. Mammalian cells are also capable of trans-splicing. [from MeSH]

MedGen UID:
109438
Concept ID:
C0600448
Molecular Function
2.

Atrophy

Any weakening or degeneration, especially through lack of use. [from NCI]

MedGen UID:
83084
Concept ID:
C0333641
Pathologic Function
3.

Muscle atrophy

Derangement in size and number of muscle fibers occurring with aging, reduction in blood supply, or following immobilization, prolonged weightlessness, malnutrition, and particularly in denervation. [from MeSH]

MedGen UID:
7754
Concept ID:
C0026846
Pathologic Function
4.

Skeletal muscle atrophy

The presence of skeletal muscular atrophy (which is also known as amyotrophy). [from HPO]

MedGen UID:
902598
Concept ID:
C0234958
Disease or Syndrome
5.

Proximal spinal muscular atrophy

Proximal spinal muscular atrophies are a group of neuromuscular disorders characterized by progressive muscle weakness resulting from the degeneration and loss of the lower motor neurons in the spinal cord and the brain stem nuclei. [from ORDO]

MedGen UID:
832697
Concept ID:
CN205570
Disease or Syndrome
6.

Spinal muscular atrophy

Muscular weakness and atrophy related to loss of the motor neurons of the spinal cord and brainstem. [from HPO]

MedGen UID:
506049
Concept ID:
CN006358
Finding
7.

Central

Applies to an abnormality that is located close to the median plane or midline of the body or of the referenced structure. [from HPO]

MedGen UID:
59958
Concept ID:
C0205099
Spatial Concept
8.

Spinal muscular atrophy

Spinal muscular atrophy (SMA) is characterized by muscle weakness and atrophy resulting from progressive degeneration and loss of the anterior horn cells in the spinal cord (i.e., lower motor neurons) and the brain stem nuclei. The onset of weakness ranges from before birth to adolescence or young adulthood. The weakness is symmetric, proximal > distal, and progressive. Before the genetic basis of SMA was understood, it was classified into clinical subtypes; however, it is now apparent that the phenotype of SMN1-associated SMA spans a continuum without clear delineation of subtypes. Poor weight gain with growth failure, restrictive lung disease, scoliosis, joint contractures, and sleep difficulties are common complications. [from GTR]

MedGen UID:
7755
Concept ID:
C0026847
Disease or Syndrome
9.

Neurodegenerative disease

Hereditary and sporadic conditions which are characterized by progressive nervous system dysfunction. These disorders are often associated with atrophy of the affected central or peripheral nervous system structures. [from MeSH]

MedGen UID:
101195
Concept ID:
C0524851
Disease or Syndrome
10.

Motor neuron disease

Diseases characterized by a selective degeneration of the motor neurons of the spinal cord, brainstem, or motor cortex. Clinical subtypes are distinguished by the major site of degeneration. In AMYOTROPHIC LATERAL SCLEROSIS there is involvement of upper, lower, and brainstem motor neurons. In progressive muscular atrophy and related syndromes (see MUSCULAR ATROPHY, SPINAL) the motor neurons in the spinal cord are primarily affected. With progressive bulbar palsy (BULBAR PALSY, PROGRESSIVE), the initial degeneration occurs in the brainstem. In primary lateral sclerosis, the cortical neurons are affected in isolation. (Adams et al., Principles of Neurology, 6th ed, p1089) [from MeSH]

MedGen UID:
38785
Concept ID:
C0085084
Disease or Syndrome
11.

Disorder of nervous system

A non-neoplastic or neoplastic disorder that affects the brain, spinal cord, or peripheral nerves. [from NCI]

MedGen UID:
14336
Concept ID:
C0027765
Disease or Syndrome
12.

Abnormality of the spinal cord

A non neoplastic or neoplastic disorder that affects the spinal cord. [from NCI]

MedGen UID:
11550
Concept ID:
C0037928
Disease or Syndrome
13.

Neuromuscular Diseases

A general term encompassing lower MOTOR NEURON DISEASE; PERIPHERAL NERVOUS SYSTEM DISEASES; and certain MUSCULAR DISEASES. Manifestations include MUSCLE WEAKNESS; FASCICULATION; muscle ATROPHY; SPASM; MYOKYMIA; MUSCLE HYPERTONIA, myalgias, and MUSCLE HYPOTONIA. [from MeSH]

MedGen UID:
10323
Concept ID:
C0027868
Disease or Syndrome
14.

Morphological abnormality of the central nervous system

A non-neoplastic or neoplastic disorder which affects the brain and/or spinal cord. [from NCI]

MedGen UID:
3306
Concept ID:
C0007682
Disease or Syndrome
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